Very possible. I know that Great Smoky Mountain Park confiscates Pepper spray. I had mine buried in my pack (not much use), another person had a small one clipped to belt. It was taken.

My large "Bear Spray" canister has a warning: " DO NOT SEEK OUT BEARS TO TRY THIS ON... IT MIGHT NOT WORK"

I ask you.... how is Natural Selection going to work if we keep warning people?