In the old days of floppies, my service disks were write protected

in the end that still was only a software switch

I'd go so far as to say that people do underestimate the number of _____ wing nutjobs in America.

I'd go so far as to say that people do underestimate the number of wingnut jobs in America

some sort of mini Linux system in the trunk, piping the captured data though GPG or OpenSSL before touching the storage

many people use an android tablet for in car recording and GPS - so I imagine an android app that operates the camera and records encrypted would satisfy needs

Careful where you point your fingers or you might leave with fewer than you planned.

it sounds like you intend to pull his fingers off .... gasp ... torturer