I've seen this situation arise a few times lately, and I find that it actually annoys me a bit. Take this question as an example. There are 3 comments posted by the same guy (not sure if I should link his profile here directly, or if that would be considered bad form) within the space of a minute that are all asking to check his answer.
One such comment is to the OP directly, and the other two are posted under other people's answers. It's all pointless, and just adds to the noise, when anyone can read the whole question anyway. It also makes me feel like the guy's more concerned with farming reputation, rather than creating an answer that is correct (which his isn't).
I could understand if he was pointing out a specific issue with someone's answer, or if it was a link to an answer on a different question, but it's neither of those.
Are these kinds of comments to be discouraged, and should I be flagging them?