i don't ... simply because i do not play with english speaking players ... thus any hatemail would be in a non-english language ... thus Sony won't get a tiny rat's ass about it because the ywon't understand it ... thus making it useless to bother exiting the game just to use the grief button ... thus rendering it useless ... thus my response ...
If I think I stand a good chance of getting them banned then I do. Sometimes I'll send a polite (as in no insults) but condescending message back to wind them up and get them to send me worse hatemail in order to report that too.
One guy started sending adult images too. Reported the lot. His friend messaged me (alas with nothing I could report) saying how I got his friend banned. Felt great.
"My name is Spartan Jay, the greatest Black Ops 2 player of all time. Because I am on your team, this team will win" ~ Spartan Jay