Calling a group of people or a board the following is attacking;
bullying, snobbish, over-intellectualised, joyless, bad apples, negative, aggressive, highbrow, patronising, preaching about sex whilst not knowing much about it themselves, shouty, ridiculing of others, etc.
Just because you do it as a blanket group attack and you don't name people, does not make it not a personal attack.
I thought there was an unofficial but generally respected rule of etiquette on MN that you take things up on the thread in question, PM a poster if things get out of hand and derail a thread, report to MN as required, etc.
I didn't think it was generally considered acceptable to start threads about threads, drag stuff across the board, claim somebody said something horrible to you on a thread without giving that person a chance to quote what was actually said or defend themselves.
Or as we have seen with the SN boards, are feminists fair game for insult and attack? I guess they must be on MN.