There will always be a range of opinions as to what is acceptable on this BB.
Everyone is entitled to discuss the CUU topic without being personally attacked.
Anyone can report a violation if they feel that they are being attacked. Hub leaders do act on the blatant examples but sometimes 'attacks' take the shape of pointed questions in the gise of debate and those can be hard to judge sometimes. I leave these alone until a violation is reported.
If anyone feels they have been attacked, the best action is to report the violation and include a brief note with the report on why or how you feel a rule has been violated. That helps the moderators see and evaluate the issue from the complainant's point of view. Hub leaders may not always agree with the complainant.