Answering comment-answered questions
I see that so often: on a basic question (like a code sample where it lacks a semicolon or something like that), someone answers as a comment to the question.
I know this have been discussed before, but nothing is concretely done to discourage that.
I personally find it very annoying, and maybe I am not alone. The main reason is that the comment is the first thing you see when scrolling the page. OP or other people having the same problem might stop reading after having seen the answer in the comments, so the answer/voting/accepting system becomes useless.
Some of these answer-in-comment even get more upvotes than real answers. Another reason is that you can't downvote a comment. So the poster of the comment takes no risk, and you can't share that this comment/answer is not good. This is not the way Stack Overflow is supposed to work.
Now I've made my point, I don't have anything specific to propose except flagging comments as "Should be an answer". IMO the comment should NOT be made an answer, because that would encourage to do this. The poster of the comment should lose points for example.
I am completely open to any suggestion though. The main point is that this practice should stop because it's not how Stack Overflow works.