I run into this question with rather simple solution which was placed as the first comment by SuperScript user.
Two minutes after this, another user literally copied this single sentence comment into answer with no added value. Since he is 113k rank and later other users commented with more useful notes, it seems to me like automated and rather parasitic behavior.
I've met situations like this before, but at least the answer added something useful. So what to do with situations like this? Is it desirable/honest to hijack the comment?