Someone I know was banned from a forum by akismet for spamming. Though the message he had posted was flagged as spam, it wasn't. And just like that the forum lost one of their most active members. While akismet and other anti-spam plugins can help webmasters fight spam depending too much on them could prove to be costly because if forum members are arbitrarily banned any time someone posts something that looks like spam but isn't then forum members would move away to other forums. Do any of you, forum owners, automate the deletion of spam and banning of forum members? Ever got complaints from active members who were banned though they didn't deserve it?