Raiding
Easter 2003 and we moved out of our old, mouldering school buildings into a new shiny one*. The last week of that term we were determined to take home as many 'mementos' of the old school as we could; notices, door handles, bunsen burners...
I remember taking home the 'T' and the 'E' from 'Welcome to the Drama Theatre' as well as a fire exit sign (?)
A boy from my maths class took home the highly-prized plaque that read 'T1', T1 being the room where you were went for a good bollocking if you'd been sent out of lesson.
The best one was someone going home with a 4'x 3' mirror from the Gladwin girl's loo.

* When we moved in, we hated it. It was too small for 1,800 pupils + 200 staff and looked like a pastel-painted prison.

EDIT: People actually took in screwdrivers to facilitate the raiding
( Peapod Has returned to the fold on, Sat 31 Jan 2009, 12:56, Reply)