Blast.... AFAIK... recording in public..... there isn't any expectation of privacy. As a road medic, I have had people literally cell phone video OVER MY SHOULDER on scene of a crash. Cops have said there is no law against it. I'd assume since a dash cam is in public, there'd be no problem. Even the 'audio' portion as it is IN PUBLIC. Hence no expectation...... Just my 2c.