You can't report private messages, you'd have to file a ticket separately, unless I'm mistaken and the option is hiding somewhere...
I'll have to look again when server comes back up. The mailing system should be identical to CO since it is shared, and I'm positive CO had a spam button 'cause lots of people were report Socrates as spamming. Now, it is possible that some people were sending mail from CO - they are offering free trial accounts I believe which would increase spams.
it may not last long as the best equipment in game is bought with badges not energy equipment which is something they can't sell as they are not tradeable.
still say eve-online as the best way to deal with them. besides banning their acct. they take back the money from the player that buys from them. if that puts the player in the negative that will tech him not to buy from them. but if the player does it three times the players account is also banned for violating the eula