Perhaps some barrier tape or fencing to keep the crowds at bay???

I don't know what the answer is but I do know that I have in the past had to keep guard duty on my vehicles either myself or with an appointed person.
I agree, the Public has much disregard for privately owned vehs as most of them are morons and don't know a jeep from a truck. Its green so it must belong to the Army.

I have found that for the most part, participation amongst MV related shows has a different culture vs public events. Maybe public events are best left to our representatives in uniform to safeguard taxpayer owned equipment?
Most MV related events, not all, have certain understood rules pertaining to the observation and molesting of displayed items.
I have been in both camps in the past; in public, leave the doo-dads home, batten everything down, disconnect the batteries, stand by and hope for the best. The general public is ignorant of everything for the most part and certainly does not appreciate the nuances of having properly displayed kit etc.

On the other hand, not everyone at a MV show is an angel either, but, many guys can and do appreciate being able to inspect and molest your veh, of course with your permission. I can attest that I take great pride in my workmanship and am hapy to show it off to persons with a true and sincere interest.