i feel like everybody has they're own valid point; as trial riders, i think it's a bad idea because we should be able to use our own power to get up the hils and climbs we face, and if we get use to having a boost during those tough climbs, we may get too comfortable with it naturally; as far as other people that would use it for they're commute or exercise, it would deffinately help take cars off the road and make the air cleaner, (which benefits us all), but people may get soo comfortable with that luxury that they will use it as soon as the going gets just a little tough, which wouldn't help as much as the majority of the people in this country need.
It simply has it's pro's and con's that can be supported with different reason, the only new problem i can see is all the effort it's going to take to find places for all these people to put they're new bikes? (granted you would need something much less than a parking lot); but i'm not up to date on the city and if they already have, or would be able to, install areas for temporary storage of all these bikes when people are at work.