If we have cameras in that situation, the PO will have no choice but to issue a summons to the person and then potentially have to show up in court if the person requests it.
Is that the best use of our police officers and the courts time? I think your intention is to provide citizens protection against police abuse of our rights but I think that the situation is more complex and getting the right mix of tech and humanity in police practices requires better training and education of both the police and the citizenry.