Seeds of chaos...
Way back when I was in the military, if you bought a used car you took the risk that it may have at some point possibly been used to maybe transport a careless drug user who dropped a few seeds in the upholstery.
If you asked the base cop shop for a courtesy sniff by the drug dogs, you were routinely denied. If there by chance was a random seed or so subsequently found, you would kiss your current enlistment goodbye, and if a career person, stop that cold. Strict liability. In your car, you own it, it is yours, you did the crime, now do the time.
This created a brisk trade in used cars that were previously owned by military members of good standing as it constituted the best defense against those random seeds dropped by other possibly shady previous owners.