Occasionally I run into posts like this one, where responses to the answers are edited into the original question. Sometimes the answer is even copied into the body of the question, or other things are said which are more appropriate for comments. It's like the asker's don't understand that the existing system, which allows for voting, accepting, commenting and answering your own question, already allows for this is a much cleaner fashion.
What should I do about such posts? Edit them? I don't necessarily want to utterly destroy what the user said, so I feel like I should flag it for a moderator, who (maybe?) can turn it into comments or something. But if so, what flag should I use?