Nope, and they don't police the door either (at least here). At the Assassin's Creed release people rushed the door who were not standing in line and they didn't do shit. I typically just stay in the car and wait for the line to dwindle, to avoid spoilers and douchebags.
I had the opposite experience at the Halo Reach launch. I actually got stuck behind a pillar and wound up moving back in line. But when the jackasses behind me noticed me finally getting out from behind the pillar, they thought I had jumped into the middle of the line and tried to have me thrown out.
Fortunately the GS guys knew me and knew I'd been in front early on, but still, it soured me on midnight launches.
Back on topic, I had this conversation with my wife:
Her: When does Mass Effect 3 come out?
Me: Tuesday.
Her: You aren't taking Wednesday off to play it, are you?
Me: Of course not.
Her: Good.
Me: (Quietly) I'm taking Tuesday off.
Her: What?
Me: Nothing!