I'm not sure how scams would even work in game? They've said in the player/player trading proposal that each trade will have what's to be traded (money/items) visible, with confirmations. You'd have to be a right twit to fall for anything there and I'd say "tough, you clicked ok"! If you do something outwith that trade mechanism (like mailing them money) then, again, tough... Don't be such a plonker next time!
Ganking should be taken care of with in-game mechanisms, if they can pull it off properly.
Basically, it should be as hands-off as possible, I hope, when the game launches. And there are always the fallback options of moving to private groups if the galaxy turns out to be full of asshats! The danger there is that a large section of people could move to private groups because of the asshats, which would only increase the issue for the rest of the punters in open play. Hopefully it doesn't go that way.