I read Mat's article about leaving and thought "darn, another troll victim", then I read the responses to him and couldn't help but wonder why people had to attack him instead of letting him go gracefully - some even had two goes at him. Why? These same people have answered troll bait and helped to create the problem, just recently I have noticed even some of the more respected members making repeated posts to trolls. That to me is bad behaviour as they know better. They know most people plonk trolls immediately, they also know that by answering trolls they bring the posts back onto our radar.
This is a concerted attack by experienced trolls, every reply is a win for them - don't do it. If you *must* do something, email those who do reply and ask them to not crosspost or reply to trolls. If you get abused by these people don't worry, they obviously have no regard for the group if they continue to participate in the troll - plonk them. The other option is to report the troll, replies only make it worse.
Just my 2c worth.
Greg