Non of this surprises me and I dont think there is a quick fix.
If you change one think to stop shit posting and alt account then another thing will pop up.
There needs to be an on going effort to clean things up and seeing people in those alt groups lots not times and not being banned or even tagged is encouraging them. Bounty managers need to agree to banning people from their bounties that are on the shit list so there is no incentive to enter lots.
We joke about good iso sir comments but they count as sig posts all the time. Why cant they be given no stakes for that week that will slow them down.
You know we all thought the ozone layer was fucked and it was lots of small changes that fixed it and not one big one. Bitcointalk isnt fucked it just needs some help from us all to make it healthy again.