I am afraid that it is not limited by police. You can see it everywhere. For example, downvoting a post with an alternative opinion and trying to have one opinion is a sign that you will be a good policeman. People like diversity only if it is a minor deviation which in this sense only confirm the dominance of one opinion. And this behavior is visible almost everywhere: police, governments, protests against police, forum moderation etc.
I am afraid that it is not limited by police. You can see it everywhere. For example, downvoting a post with an alternative opinion and trying to have one opinion is a sign that you will be a good policeman. People like diversity only if it is a minor deviation which in this sense only confirm the dominance of one opinion. And this behavior is visible almost everywhere: police, governments, protests against police, forum moderation etc.