Same as non-legal ebikes perhaps? Where I live the police don’t seem to care unless the rider happens to be a drug dealer or otherwise wanted by the police.

I’d take a guess that while a ring doorbell might be illegal and not enforced, it probably means the recorded footage might be not accepted in court if ever needed… Perhaps (I’m not a lawyer or even closed SE to an expert). Unless a doorbell inspector becomes a thing then it probably just slides.