I'd personally like more of an IM element to the in-game chat system.
IE: The ability to 'go ghost' as in not receive any private messages,
to set a player's status to 'away, busy, in tower, in flight, tanking' etc.
Also the option to
*temporarily* disable all chat, country chat, etc.
If HiTech ever sees this and strokes his beard, thinks to himself 'that's not
a bad idea...' He could save space on his scrap of paper that is the 'to do'
list by condensing it to 'more in depth chat system' or something. Just my
imagination toying with what I want though
But I agree DR7, simply the option to 'disable PMing' would be good.