enough that the sheriffs in my area waste tax money at hauling big construction signs, park them near parking lots, and turn them on 24/7 to remind people to lock or hide their laptops.
Indeed. Whenever I travel I lock my laptop in the trunk. In my car the trunk can only be opened by the remote attached to my key (or by someone with a really good crow bar or chain saw but that would cause way too much noise).
(followed by long islands and jager bombs. and yes, our data was protected by dropbox, we didn't lose a second of work ;))