It should be pointed out that, of course, it is often hard to determine who is really responsible for the degradation of a reasonable discussion into a flamewar. Someone who posts a contrary opinion in a strongly focused discussion forum may be easily labeled a "baiter", "flamer" or "troll". Therefore, it seems especially important to point out the rules and focus of a discussion forum to avoid misconceptions about its accepted use.
Flamebaiting and flaming are an interesting psycho-social phenomenon that no doubt will be exhaustively studied within the next decades as the Internet matures.
See also Internet troll.