No kidding...
Let’s say they were able to try this, and former residents don’t pay. How do they think they will collect? They are not the IRS. I suppose they could threaten to arrest you if you ever entered the state.
It is not constitutional, and they tried something similar before as was mentioned earlier.
Tax-collectors are nothing if not imaginative.
Rest assured that they will find a way!
Did you perhaps leave any real property, bank accounts, or chattel in California? Are you perhaps expecting a little inheritance from a CA relative? Need a photostat of your CA birth certificate? Then they got yuh!
Regards,