See the problem is that empty plastic shells are available for purchase by anyone and as we all know you are not limited to only shooting "paint" if you wish to be a
As are nylon, rubber, "scented", oil based(for actual tree marking), powder filled and a certain companies "GOLF" balls. None of these especially the plastic that could be filled with anything some
could get his hands on are suitable for "play" or recreation and are not "restricted" per se.
That scares me more than some capsaicin powder at one particular wallyworld.