I normally tell Griefers to just go die in a housefire. No need for N-bombs. I try to subscribe to this offensive but succinct axiom: "Arguing on the internet is like running in the special olympics, even if you win, you're still retarded."
However, i still sometimes succumb to name calling, and channel my own inner Al Swearengen from the HBO series "Deadwood."
favorites:
"Catpiss-smelling c0cksucker"
"Douchenozzle"
"Pineapple face"
"Full-blown AIDS hole"
"Eat my balloon knot you c()ntbag"
"Goldbricker"
"Palooka"
"Patsy"
"Booster Gold"