Wouldn't worry too much about theft - realistically your laptop, iPod, and xbox are going be taken before anybody thinks about snagging a big ungainly amp or guitar.
Had some folks who pulled the fire alarm my freshman year in another building and walked thru the hallway putting laptops in a big sack from every room that was left unlocked Fortunately they got wise and dumped the bag behind some bushes and laptops were returned to students.