With the new 200+ player servers the filters is a must.
A chatfilter would be great aswell, gets old reading "At fifteen, I had the will to learn ; at thirty, I could stand ; at forty, I had no doubts ; at fifty, I understood the heavenly Bidding ; at sixty, my ears were opened ; at seventy, I could do as my heart lusted without trespassing from the square." over and over. Its not even trolling, its just spam.