I agree with points 1 and 3 but not the second one. In fact I think it is destructive. One must never under any circumstance look away from the bad. One should not be good due to ignorance and inability. If we filter out the bad words it'll be like filtering out violent video games, movies and even violent news articles. One must never shy away from the horrors or they won't know till the bad stuff wreck their homes.
That's why there are 3 filters, it should not go through all, with one is enough, if it is not necessary and you are not completely sure of that, then it's just a rumor, and a malevolent rumor does not make much of a problem. If it is necessary, or it is true, then even if it is not good for anyone, it must be said.