Your average 40 hour work week will include five 9-hour days (gotta include that lunch hour) along with another hour allowance (at a minimum) for the drive to and from work, if it only takes 30 minutes to get there. Hence, you will spend around 40-50 hours with the people you work with. That leaves you 52 hours to yourself...well, sort of.
You've got to prepare for work in the mornings which will take anywhere from 30-90 minutes depending on how much prep you need. If you go to church, that will eat up anywhere from 2-4 hours, not including prep and drive times. Then there's food preparation, depending on how much you cook at home. The point to all this is that you likely spend just as much time around your co-workers as you do your family at home.
On my desk at work, I've tended to keep some kind of receptacle that holds water (or something equally to less drinkable). I don't secure it or much of anything else, but just assume that my co-workers will just leave it alone. Apparently, this is not an entirely safe thing to do in some environments.
I don't remember the exact circumstances surrounding this conversation, but somehow, I ended up in a very short conversation with someone (probably one of those people who can't handle more than 10 seconds without a work spoken, and also probably in an elevator) and mentioned that I always had a water bottle or something on my desk. He said that I must really trust my co-workers.
This was a guy with that sort of look on his face of absolute conceit, as if he were the best thing that ever happened to any room he entered, and the world grew a little darker when he left. He looked like a prankster. Now, I considered his words over trust, and the only thing that came to my mind was that if you can't trust your co-workers, who can you trust? No, you're not bound to them, but at the same time, you're really stuck with these people every day of your life until you or they move on to something else. Change can always happens, but until it does, you'll be seeing them tomorrow.
There are always those that think it's hilarious to mess with people, and while this can certainly mix things up to keep life interesting, there is always a line in my opinion. You should never interfere with someone's ability to do their job. I knew someone who had a habit of doing "something" to people's computers when they left them unlocked. One that I know of was when he changed someone's screen resolution to 640x480 which completely screwed up the layout of the icons on their desktop, but the worst was when someone unplugged someone else's phone. Our phones are on some complicated network system that I don't fully comprehend, and unplugging the phone caused it to basically reset. They had to call IT and everything to get the line reestablished. This was followed, of course, by a mass email telling everyone not to do that.
I believe you should trust and get along with your co-workers. After all, they're pretty much your second family, and you probably see them more than your main one.