No, no and no.
I made a thread a while ago about a "bad player" and told my story of a guy who was rude to me (without names).
I would never, in MILLION YEARS, give out his name though - well not on forums at least.
There is always two sides to a story and sometimes people who get mentioned in posts like that won't even know about the post to go defend themselves.
Also, I do think that sometimes even the virtual bullies just need a friend to make them stop being idiots - flaming them on forums wont actually make any difference, well it could actually make things worse.