14.Randomly
delete files or documents off of people's computers. I
don't actually do this one myself, since I'm in MIS & get blamed for
computer problems even when people delete their own files.
But I highly recommend it to anyone else. If you're pure evil, mess
up registries. If you're just mischievous, rearrange their desktops
or startup files. Or change their passwords or send nasty email to
the boss from their computers when they go to lunch. DO NOT GET CAUGHT,
or you'll really be in for it.