First off, what the fuck if griefers/non-griefers use DU tags? (example of a dufag with no tag: STEAM_0:1:24318110 this guy along with others claimed to be from DU without a DU tag.)
Secondly, if you're going to IP ban every single IP with a DU tag. Couldn't they just tell people to put on the tag when they join your server? Griefing without even having to join. Good job on telling everyone about it too on the forums, because OBVIOUSLY griefers don't know how to read.

Seriously, stupid ideas. Horrible.

yes your idea pissed me off so much that i had to sign up and tell you how dumb it is. i was that annoyed.