If you call 911 it is by definition an emergency situation, so no I don't believe this could be abused outside of emergency situations. Also, 911 already gets your location and that feature isn't something that gets abused (again, I fail to see how it could, your phone sends its location when making the call, it's not the authorities requesting its location when receiving a call).

Automatically letting 911 know where you are when you call is something that saves lots of lives, trying to improve the speed and accuracy of that is a good thing that should not be controversial at all.