So I was just minding my own business, doing searches and flagging answers that aren't so they could be removed by people with more rep than me when I came across these two questions:
and I was at a loss.
In the first one a user does the old question-in-an-answer trick and then goes on to answer his own question in a subsequent answer. What a mess, I thought. But then I saw number two... which is clearly an attempt to pull off a webforum-esque conversation on Stackoverflow: OP asks question, gets answer, accepts answers, asks question in new answer, gets answers to that from guy who wrote accepted answer in yet another answer etc.