Going to college, I often lock up my bicycle on an outside parking area for about 7 hours. By the time I am about to go home, there are only a few bicycles left that is parking next to mine. Often times, my bicycle is the only one left in the area.

Some of you might have already realized from my post history that I am quite paranoid about thieves and vandals. It does not help knowing that my bicycle is a lone potential target for several hours (even when the parking area is quite nice).

It would comfort me a bit if I know that I am not the only who have to park this long.
How long do you usually leave your bicycle(s) locked up and parked in a public area?