for a trial period of a few months (to begin with).
The consequences of the tribal associations and enmities that originate in CB affect the rest of the site because of the troll postings. Getting rid of CB might result in the loss of some regular contributors to other sites but you could gain more new users who are put off by the abusive/profane/stupid nonsense that appears on this site far too often. Once CB is gone the current system of reporting chatting would suffice.
Make this a proper Q&A site, reduce the social networking aspect.
There is a miniscule number of posters who make the sorts of comments you mention.
The Editorial team deal with them as quickly as they can.
There is little that can presently be done to prevent 'anyone' posting 'anything' 'anywhere'.
I'm not sure why the majority of sane and sensible CBers should suffer for the actions of one or two.
'Really nice'? no need to exaggerate, can't stand people who blow their own trumpet, it's bad manners tut just settle for nice and we'll monitor your progress