Quote fromThe problem with the 100% freedom policy is that people are as free to destroy as they are to create. If you were presented with some land and one hundred people to live on it, but there were surely some sexual offenders / thieves / murderers in there, wouldn't you want to screen them before letting them in?
How accurate is your screening process?
All anti-griefing tools should be server options and users should have the ability to see what is and isn't enabled before they join a server. People should be able to use filters so they can more easily select servers run the way they prefer to play.