This is a follow up question which I asked here. There were a lot of great answers, the consensus seems to be that police unions could be outright dissolved or a new version of unions could form where the level of "control" or "influence" over the police department itself could be put to check, without being in breach of democratic rights.
My question is what are the pros and cons of having police unions?
Banning police unions was one of the demands which were put forward by the Black Lives Movement. I understand banning the police union would have some form of negative political backlash especially since as pointed out in the comments, that this was not suggested by either the dems or the GOP. But my question is if it would yield net positive or negative results for the general population and disregarding any political fallout regarding whether this would generally be perceived as infamous move as in the case of banning the union. The reason for asking this question is that history has a lot of examples where grassroots movement demanded something which was not suggested by either democrats or GOP but was eventually codified into a law or a bill. I am not saying BLM could, should or would just that if banning police unions would bring about positive or a negative result to the majority of the population.