[DaNIEL MeNTED]

Indeed ... I recommend anyone who isn't sure the RBL is granular enough to not block legitimate users configure the first three options YES - YES - NO and give the blocker a forumid to post reports.

We have not had problems with trolls as yet... although our site has only been open less than 2 months and only has about 1000 users. I'm using the multiple login detector to track when we have more than 1 user @ a given IP but my experience on other boards is that trolls use proxies to get around IP bans... I have seen the same person banned 5 or 6 times in a day, and I have seen registration turned off temporarily to stop trolls from registering... this is much more intrusive than banning their IP and blocking registration from proxies.

I'm a bit of a prick so I have the RBL Blocker configured to block registration... you could easily configure it to allow registration and only change it to block if you start to get a lot of hits in association with troll activity on the board.

In part, allowing the person to get to the "submit" portion of registration also captures and hotmail/etc. addresses they have setup to get around IP/email address bans.

Of course... you will have to manually add those email addresses to the email banning options. The other option would be to enable auto-banning.