Well there are 2 types of bike thieves, ones that steal because they want to hawk the bike for parts or entirety, and then the ones who just want a bike to use. I've seen junk bikes with missing front wheels cos the owner forgot to lock the fronts, and I've also known people climbing fences to steal $15k carbon bikes left unsecured at home. Invest in good locks, be diligent in where you park and hope the next thief sees someone else's bike first! haha