I don't really agree with the characterization of it as a "free ride". Yes, it's using a few fractions of a cent in power it wouldn't otherwise use, but that's a rounding error. Outside of that, what costs are the customer being asked to bear?
The preamble of the Constitution does not contain any prescriptive doctrine, so that establishes no rights.
That said, the authoritarian's desire for a crime-free environment means that the actions of the police are really accomplishing the exact opposite of establishing justice, insuring domestic tranquility and promoting the general welfare.
It's probably already done, but given that most locks that use a physical key can be easily picked and all locks can be easily cut with bolt cutters, I don't see this as making the lock any less secure than the old-fashioned kinds.