Abstract theory by McGee. My tourist theory. Any Ohioan crossing the state line into Florida should be fitted with a metal box that rests against the small of the back. Every ninety seconds a bell rings and a dollar bill emerges part way from a slot in the top of the box. The nearest native removes it. That would take care of the tipping problem. At places where hundreds of them flock together, the ringing of bells would be continuous.
