Will they go after the car pools next?
No because those are free. It's the presence of money in any form or amount that triggers the primal instinct by the state (and taxi unions) to control or kill.
What would be nice is a kind of Tinder for car sharing, where you could put in a starting point, and ending point - people could read your profile and see a rough distance from their own starting and ending points, and swipe right if you seemed like someone they would want to ride with...
There would be no money in that (for the drivers anyway) so the taxis/state would lay off.