trespassing, no id, so he can't prove he has permission to be there at that time(ie prove being a student of ucla)
same deal at my library, from 10-30pm-2am, you need to have student identification to be there
my friend was a one night stand last year
basically a cardboard box with some drawers drawn on, a lamp and a kleenex box were attached and some condoms were stapled to the front