Jeri,
I hesitate in answering this, in case it gives people ideas...
It is however, very easy to set up 10, 20, however many you need, new and valid email addresses every day.
Getting that number of different proxy IP addresses isn't difficult either.
My worry is that the really nasty flamers will find a way through anyway, but the nice innocent guests will suffer, and lots of new people won't bother with the site any more
People who like to 'hack' enjoy it more if it's a challenge...
Paul
Email: pmcfadden@ntlworld.com IP Address: 62.252.192.5