If this is allowed to proceed any safety benefits with ADS-B will go away due to pilots turning off their transponders. If the FAA thought it was a challenge to get owners to equip with ADS-B, owners will never trust the FAA for any further equipment mandates, especially since the ADS-B mandate was sold as being able to handle more traffic, something that has not happened. Rubbing that in by using ADS-B data for increased fees will eventually backfire on the agencies trying to do that.