Thanks Vixtor, that was a perfect reply.

I tried to look for some threads on bike locks but didn't find a thing! Is a bike lock good enough to deter most thieves? Which security devices do you recommend? And is there anything else I can do if I have to leave my bike on a bike rack or chained to something (I see some ppl take off the saddle)? I'm sure college campuses are a great place for bike thieves =/.