Steemit is kind of part blog, part FB/reddit/twitter/tumblr. If you think of it as a blog, that's rather over the line. If you think of it as Facebook, that's like 80% of what FB is, just sharing content you didn't make but thought was worthy to share. On FB that's called curation, much like we call upvoting and resteeming here.
Since Steemit is both, it resides in a gray area. I haven't seen this particular user, so with that in mind, taking a similar name and sharing ONLY their content, if that's all he does, seems more on the shady side. If he shares other things as well and is posting essentially what he thinks is the best stuff on the internet, that's just FBing it.
I mostly post my own original content, but I've shared some videos I didn't make because I thought they were important.
If all he's doing is copying ONE site, then I would click that link to support those content creators. But if I'm scrolling through my feed and see one YouTube video and one crypto article c&p'd and one news article from a different site and a meme? I'm not going to four different sites, I just stay on the feed. I guess for me it's the blatantcy or not, disclaimer or no.