If I buy a motorcycle, it is tagged and registered. No different than what bicyclists on public roads should have to do. As a matter of fact, if bicyclists insist on riding on public roads spec'd out for automobiles, I think they should have to go through a safety class first; and I am not talking for their safety, I'm talking about the other legal drivers' safety.
No difference at all? What about that thing called a "motor?" Motor vehicles are charged a tax.