Quote fromThe solution to griefers is good server administration, not tyrannical limitations on new players entering the map. The game is meant to be free and limitless.
this is so true
enable voteban/votekick. i make the values pretty low since there are always 2+.
like 1 for kick. 2 for ban.
also. i just ask my players to type a message if somone is griefing. i just chill on my computer, playing tf2. checking the console every now and then for messages.