There is no shortage of people that break the rules, I must have seen 1/2 dozen or so adults pulling their kids around on tubes/waterski`s this past weekend and not one had a spotter.
I saw one guy pulling his fam on a huge float thingy and the thing actually got airborne for 20 feet or so, the driver was clueless because he was looking a head and no spotter of course.
I am sure the kids thought it was cool,wouldn`t have been too cool it the thing would have flipped!!