phpBB prevents them from hacking into the main site and messing with it doesn't it? or did I understand wrong? cause that would already prevent part of the trouble with trolls that Commando mentioned.
[quote=Moka]The new version of phpBB will provide new ways to stop spammers.[/quote]
sounds good enough to me without going to extra measures, at least until there's given reason like if some gets through it.