Since when has any cab >2 months old been safer to drive in than a car owned and operated by a member of the public? I don't take cabs because, being a mechanic, I can tell that they do not replace safety items prior to failure- items such as brakes, suspension joints & knuckles, bushes and shock absorbers... etc. (And the list really does go on...). Don't get me wrong, I am not verly concerned about the car crashing- it is driven by a person (at present*) and they can usually avoid the worst kind of impacts possible at city speeds.
It is more that I can't stand the rattling, banging, wobbling and klunking that the driver* has to be professionally oblivious to.
* Not for much longer thanks to Google
** and presumably, City councils and state government staff and our elected members, legislators.
A community run taxi service won't run shoddy cabs- certainly won't if they maintain their rating/feedback system. If the taxi companies had a rating system, they'd have to keep their cabs safe (to a reasonable extent) too. If our legislators ban car-sharing to protect their mates' profits, they'll flush all these benefits, as well as improved service down the drain along with the savings that are beign made.