+1. I realize it is probably your choice (depending on where you live), but it is not the brightest choice. As for me, I always make my passenger wear proper protection. This means a helmet, jacket, gloves, boots, and at least jeans. While all of this may not be readily available (like a spur of the moment thing), I would never have a passengers with anything less on than a helmet, shirt, jeans, and sneakers. As the operator, you are repsonsible for your passenger.