If someone can afford to roll up to work on a bike that expensive, they are probably not worried about it getting stolen. Specifically, they either likely have

If someone can afford to roll up to work on a bike that expensive, they are probably not worried about it getting stolen. Specifically, they either likely have somewhere to lock it up, or can afford to replace it (and/or have it insured). Make no mistake, rocking up to work on your Factor/S-Works/Cervelo/etc is a flex, either deliberately (look at my boutique, expensive bike, peasants), or subconsciously ("oh yeah, my bike? Yeah picked it up the other day, know the guy that owns the shop").