Base ball bat here to, chained up as well as possible and bike shed has an alarm. We don't leave our bikes out of sight and they'd have to nick the van when out. We always have one of us with the bikes, I'd fight to the death if needed (car jacked once and drove the car they wanted into a wall and they said I was mad !!!cheeky beggers). However, being sensible if they really want it they's get it, they are both well insured.