I'm not concerned about the regulators. What concerns me is the easy access by police and TLAs to so much data about who went where, when, and with whom. Mass surveillance, complementing collection through all the other methods.
The exact same information is collected by public transport systems where you have a pass which you top up with your credit card, if the authorities want access to this data they just get in touch with the transit authority. I hate it and avoid these systems where possible.