WARHURYEAHomniInsomnia event security is pretty tight, honestly. They check all bags, plastic, backpacks, whatever. You could get a mouse or something stolen, sure, and that would suck, but your computer? Not likely. Not ruling it out completely, but you're 99.9% safe leaving your PC.
Hell, one time I didn't lock my computer and some dude I didn't know who didn't play tf2 locked it for me instead of trying to steal my virtual pixel hats.
iSeries is a good place to be.
Not exactly saying this is 100% correct but I have been able to leave the area every time I go without a sticker on a PC or laptop.
It isn't 100% safe by any means at all but it doesn't mean that people go around nicking shit, to get in to the BYOC areas you have to have a weekend pass I think now, so you can only steal a PC or laptop if you paid for a full weekend ticket.
Just take anything that you can take back with you as well. But I've not had anything nicked but I have had a friend that has had a mouse and headset stolen.
Yeah i'm planning to unplug my mouse, headset and keyboard and take them with me when I live for the night.
It's just that feeling you have in the back of your head, "You know its unlikely that something would happen but what if it did"