the way i see it is, who cares. otherwise, i say, real bikers wave and real bikers wave back. in other words, it doesnt matter what they are riding, or if they are even riding at the time, if they wave at me, they get a wave back. if i wave at another rider, he'll/she'll wave back if he/she is a biker, regardless of what he/she is riding. to me a biker is any individual passionate about riding (motorcycle, scooter, bicycle, etc). even if he/she does not even own a bike at the time. riders are the ones who just ride two wheeled mechanized transportation. unfortunately, there is no way to tell who's who until you wave.........so, wave on and have fun!