Civilized society depends on well-articulated laws that enable citizens to understand what is legal and what isn't, and allows Police to make use of force when it is appropriate, and prevents them from using force when it isn't.
"The legitimacy of policing in the eyes of the public is based upon a general consensus of support that follows from transparency about their powers, their integrity in exercising those powers and their accountability for doing so."
Edit: the principal is known as "Policing by consent", or the Peelian Principal [1], which is fairly common in the UK.
That's true! And while I certainly agree that we have some problems in this area, I don't think they rise to the level of "don't ever answer the door if the police knock on it."
"The legitimacy of policing in the eyes of the public is based upon a general consensus of support that follows from transparency about their powers, their integrity in exercising those powers and their accountability for doing so."
Edit: the principal is known as "Policing by consent", or the Peelian Principal [1], which is fairly common in the UK.
[1] https://en.wikipedia.org/wiki/Peelian_Principles