Exactly what ISEEYOU2 said. Saying that we should disable it because it could be used for ghosting is a misguided suggestion. First off, I really doubt ghosters would use our PM command when they could just use Steam chat. Second, if they were really that dumb it would be better for us because would have definitive proof that they were ghosting using our server logs. Third, again, if they're dumb enough to use the PM system rather than Steam chat to abuse someone we have evidence for a ban.

I really don't see a valid reason to disable it, as anything that could possibly be abused with it could be more easily and discreetly abused with Steam chat.

I would however like to know what these "many other things" are that you mentioned, Nano. One of them could be a problem that needs to be solved.