[@Spiffy] It's one of those "can but shouldn't"'s that people don't understand at my workplace all the time.

Me: Alright, so, we're waiting on the new hard drive to arrive for your computer.
Customer: So I can take my computer home, right?
Me: Well, yes, you can, but you can't do anything with it, and you'll have to bring it back in when the hard drive comes in.
Customer: Great! *takes computer*
Me: *slams forehead against desk*