Indeed. And some folks rode across the world in the 1800's on penny-farthings and some guys eat half their weight in hot dogs at contests. Just because people do it doesn't mean it is a good idea - as we all know...

Folding bikes are fun. They seem like a good idea when you hop on them and ride around the campgrounds, but picture a five year old on a tricycle pedalling five miles and realize that the difference in wheel size of a folding bike is closer to a child's tricycle than it is to a road-worthy bicycle.