Anti-griefing is important on any semi-serious server that is publically available or doesn't use a strict white list. Believe me, people will find your server

Anti-griefing is important on any semi-serious server that is publically available or doesn't use a strict white list. Believe me, people will find your server. They find servers that aren't listed, and these servers are publically listed. And they come and they grief. The kids, the 4chan trolls and whatever you want to call them. I've dealt with it on a number of occasions. Someone places a few thousand blocks of water everywhere, which must be removed by hand. (Unless you're using anti-griefing tools, which prevent TNT abuse, lava abuse, allow turning off certain elements, and give you the ability to rollback a players changes by time). Anti-griefing in minecraft is like backing up your data. You don't think you need it until all your stuff is irrevocably screwed up.