This seems to be a general issue with any sort of attempt to impose restrictions on police-like agencies these days - between the boundlessly sympathetic legal

This seems to be a general issue with any sort of attempt to impose restrictions on police-like agencies these days - between the boundlessly sympathetic legal system, the political power of police unions and an institutional culture that distributes responsibility between superiors and "boots on the ground" in a maximally deniable way, in practice the only way to get them to abide by a rule is to get them to believe themselves that to do so is for the better.