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Abusive Downvotes? Sorry but those were some of the best cases for downvoting:

slanderous tripe post characterizing the community as a Cesspool of Pedophiles and other such low level scum.

You on the other hand think that it's a misunderstanding, that the poster didn't deserve do be instanuked and seem deluded into thinking that removing the word pedo from a flurry of equally inflammatory insults changes any fucking thing.

O yeah, A+ for effort.

If you believe that all ad hominem attacks should be downvoted, I can actually agree with you on that.

However, the "problem" here is that only SOME ad hominem attacks seem to be WORTHY of downvoting and that "standard" seems to be HIGHLY SUBJECTIVE AND SELF-SERVING.

Those aren't ad hominems. An ad hominem is not simply an insult, it's initial position is one that revolves around something OTHER than the other person and their character, motives, beliefs, but it falsely tries to suggest or indicate that it's about the other person, what their intent is, etc..

(of an argument or reaction) directed against a person rather than the position they are maintaining.

An ad hominem argument is often a personal attack on someone's character or motive, rather than an attempt to address the actual issue at hand. This type of fallacy is often witnessed in debates in courtrooms and politics. Often, the attack is based on a person's social, political, or religious views.

So when the issue at hand doesn't exist and the only position is that Person A is such and such, it's simply a matter of slander/libel, an insult, a Personal Attack and that is not protected speech or Free anywhere, it's called Defamation. There's certainly no problem of "only certain ad hominems attacks get downvoted" or that downvoting was disproportionate, the problem is that Defamation is regarded as a common logical fallacy.

From your own quote,

...directed against a person rather than the position they are maintaining.

...is often a personal attack on someone's character or motive...

So If I suggest that you're holding a particular viewpoint because you're paid by an interested party, that's an ad hominem attack.

If I suggest that your viewpoint is invalid (wholesale) because you're a moron, or some other derogatory term (like child molester), that's an ad hominem attack.

It really doesn't matter if the ad hominem attack is "true" or not. It's still an ad hominem attack if it's aimed at the person or their character or their motives (the mind reader fallacy is another common example) instead of at the LOGICAL STRUCTURE or COHERENCE of their argument.

An ad hominem attack is often in service of a rush-to-disqualify a debate partner.

Defamation and slander and libel are synonymous with ad hominem attack.

Indeed yet when there's no position and it's simply an insult it's not an ad hominem. Not all insults are ad hominems and not all ad hominems are insults, but all ad hominens must have a position or argument that it tries to undermine by changing of position/argument. Without any position to defer from it's simply a Personal Attack.

I am confused!

Not all insults are ad hominems and not all ad hominems are insults, but all ad hominens must have a position or argument that it tries to undermine by changing of position/argument

I needed to look it up.
ad hominem
adj. Attacking a person's character or motivations rather than a position or argument.
adj. Appealing to the emotions rather than to logic or reason.
n. To the man; to the interests or passions of the person.

how can you insult someone when it is not about wanting to change a persons way of seeing something? ether the person you are insulting or other onlookers.

Is it one of my blind spots or one of yours? I am not sure yet.

For example, if someone says "your favorite president is an idiot", it's an attempt to discredit and or disqualify anything and everything they say (and strongly implies that you're also an idiot for choosing such a buffoon as your favorite president, the guilt-by-association fallacy).

It isn't specifically aimed at undermining a particular "argument" or "position" they might espouse, it is a general dismissal of EVERYTHING they've done and or might do in the future.

Saying, "your favorite president is an idiot" is an ad hominem attack (both a direct and indirect attack).

It's also a broad-brush fallacy.

It's also a bald-assertion.

It's also an appeal-to-ignorance.

(1) Please provide an example of an ad hominem attack that is NOT an insult.

(2) Please provide an example of an insult that is NOT an ad hominem attack.

Insulting someone is not necessarily an instance of an ad hominem fallacy. For example, if one supplies sufficient reasons to reject an interlocutor's argument and adds a slight character attack at the end, this character attack is not necessarily fallacious.

Equally an Ad hominem that isn't an insult when it is True

Canadian academic and author Douglas N. Walton has argued that ad hominem reasoning is not always fallacious, and that in some instances, questions of personal conduct, character, motives, etc., are legitimate and relevant to the issue,[26] as when it directly
involves hypocrisy, or actions contradicting the subject's words.

Wiki

Equally an Ad hominem that isn't an insult when it is True

Citation please.

...and that in some instances, questions of personal conduct, character, motives, etc., are legitimate and relevant to the issue,

The key problem here is that character is QUALITATIVE (GNOSIS).

The other key problem here is that motives are QUALITATIVE (GNOSIS).

And you seem to be glossing-over the point that even your source specifies "in SOme instances" (probably when the question tautologically involves questions of "character" and or "motive", of course under those conditions "character" and or "motive" would necessarily be relevant). HOWever, "character" and "motive" are both beyond our epistemological limits (un-quantifiable, self-reported, implicit, subconscious).

And your bald assertion that an ad hominem attack is not fallacious if it's "true" is not supported by any of your quoted sources.

It is a nice effort on your part to try and bring calm...

However, I do agree with the downvoting in this case... perhaps not so much on the continued downvoting... but I wasn't there and I don't understand the whole situation and history.

If name-calling is a downvotable offense, then there's basically no guiding principle.

Which is fine, I guess, if that's the consensus (simply add it to the list of rules).

Just don't try to pretend that there's a difference between "name-calling" and "libel".

And some sort of warning would seem to be in order before stomping a newb down to (0) rep.