I have a problem tho, now... Because just today (literally just an hour ago) I saw, not one, not two but THREE gas powered bikes.
Bike number #1: Gas Bicycle on sidewalk, under power, going slow, heading "against traffic" (Under power-illegal... on wrong side of sidewalk (cars coming out of driveways don't look where other traffic is going, they look were traffic is coming from, so might not see bike coming from that direction)-dangerous.
Bike number #2: Gas Bicycle on sidewalk, under power, going at least 25 (illegal and pretty dangerous).
(I was in the road and doing 19mph and he passed me up, pretty quickly..)
Bike number #3: Gas TRI-cycle on sidewalk, under power, going about 20 (illegal and extremely dangerous for the pedestrians). P.S. They didn't even have a chain.
So within one hour, I didn't see one of them with a helmet..(I always wear one), they were riding under power on the sidewalk (a big no-no/illegal) and you wonder why a lot of people are against guys on gas bikes.