Uber is doing this expecting the cities and existing players to get pissed off and try to stop them. And then they publicize the anti-competetive nature of it.
That's their strategy. Get local news to write about how the city & cabbies are trying to shut them down. It's great marketing.
And it benefits Uber not to talk to local government prior to launching as long as they follow the letter of the law.
This is a genius strategy. But if I were the CEO, it would cause me stress that all of my drivers in a given city might be forced to not work indefinitely because I'm not getting the OK first. Maybe that won't happen.