its just pure rude
why do it?
just think of the small children and babies who ride the path, and the parents who hate you for doing it. Also, pets! I know many pets, including my own, go crazy, i mean shit crazy, when my moped starts or even rides near him.
Laws are made for people who are too stupid to just use there own mind and morals. Just use some common sense, and let the bikers and walkers do there thing.