Personally, I see their way of posting as low-key spam. But that's just my subjective opinion and I simply try to ignore those people.
It's not, unless we can see that as post-count inflation and/or some sort of spam. If we take a look at OP's screenshot, that thread probably was something to do with instagram login problem and the member suggested reaching out to instagrams support. Like.. wtf.. for real.. anyone who ever tried to use instagram support will know it's absolutely useless and there is no chance that will help.
So the suggestion was misleading, wrong, and useless.
Is bad, misleading and wrong advice better than no advice?
If there is anyone else who is annoyed by them in the same way I feel myself, - just to add them to ignore list.
I tried to call them out once or twice by asking them to elaborate on their advice which I clearly knew are wrong and misleading, but they ignore it.. so much for the big help and wanting to save the world haha.