I would see Real I.D actually taking trolling to an entirely new level. A troll begins to harass you so you stop responding to him. The next day you receive a phone call from him, making inflamatory and threatening remarks. Pizza's that you didn't deliver start being sent to your door. Hell if you have were you work posted online, imagine all the damage that could be done when the person calls your place of employment in a rant. All these things happened to Blizzard Employee Baishok just an hour after he posted his real name on the forums, as a sign of good fate.
Also don't get me started on google. A potential employer googles your name, the first thing that comes up is a 15 page argument on whether Death Knights are overpowered or not. That will almost always leave a bad impression.
Blizzard could fix about 90% of the trolling problems if they just bothered to fork out an extra couple thousand bucks a month for some full time moderators. Hell, they could appoint community moderators and do it for free.