Well, one could follow you home regardless, to find out where you live; it's not really a safety net to make plates confidential.
A phone book has many names, addresses; i.e. there are plenty of ways to find someone.

I saw a car driving around my yard one night, revving the motor, spinning donuts. Called cops, who caught him, turned out it was a teenager, was trying to revenge an ex-girlfriend but got the wrong address!
I didn't press charges but the cops took him in anyway for driving drunk.