If you want to help, post this patent application to askpatents.com and get some feedback on prior art published there that a patent examiner can find.

This wouldn't be the first time Uber has tried to patent something obvious (http://patents.stackexchange.com/questions/5900/mobile-taxi-...) and I'm sure that they will keep whacking away at bad patents until one slips through. There's very little cost to them to file, and if they are lucky enough to get a bad patent accepted, I'm sure they'll be delighted to use it to block competition.