What things do you guys look for when determining if you should reject or accept a user?
Here is a pic of 3 users that it has picked up on. The 1st and 3rd have the same IP so I am assuming they are a spambot.
Is DNSBL matched reliable? Are there many false positives?
As for the 2nd user he seems to have only been detected based on username. Looks like a fairly normal username to me. What would you do?