The forum's ability to stop trolls is inherently limited, it always falls back to users protecting themselves. The ignore button remains one of the few reliable tools we have and the best choice in my own little suggestion.
In this regard, we should encourage members for more use of the ignore button as well as the report button for trolls seen on the forum, we cant do without having them come in once a while, but when such is observed, then we acted accordingly and as appropriate.
That said, the pseudonymous nature of the forum makes accountability tough. If real world identity were tied to accounts, admins might face more pressure to act against misconduct.
I may not support this, because the forum supported it for our maximum privacy which they also respected, if all we preach is about the same privacy with bitcoin, then the forum should as well be in the best position to give it as well on its users, the issue of troll should not cause us to lose on this.