Quoted from bstyles:Has anyone developed an automatic cattle-prod that pops out of the coin door area and teaches the offender a lesson?
Yes, but it just encourages Beelzeboob to turn with his butt against the coin door and pour drinks over his shoulder.
Your choices are to not allow food and beverages, have the people playing monitored or putting a convenient drink holder in place and trying to let people know it is there is what most have done.