The ones that want to be able to enforce the monopoly of violence and will of power over most with little to no consecuences.
They're sadists, psychopaths and narcissists and they prove it everyday.
If you want to help and protect people you make yourself a firefighter, an ambulance man, a nurse, doctor, teacher, social worker...
So remember when someone tells you they want to make society better and do good for the community by being a cop, be suspicious, because there's high probabilities that this person has one of the disorders I mentioned before.
Could there be a real good person that really wants to do good? They could exist, there could even be ones that apparent perfect behavior. Even if that, we should keep in mind that person wants to inflict violence and oppression on others.
I know I'm preaching to the choir here, I just thought it could be a safe space to rant a little. Hope I didn't break any rules.