The police has many different branches, from the Sheriff's department, to the local metrocops, to the ultra-corrupt state trooper. The bulk of law enforcement has little to do with 'protecting and serving', but rather the taxation of people. The more the police can pin on you, the more you have to pay for a citation, possibly even bail.
Police officers themselves can be fair, but considering most of them are taught to put themselves at a higher standard than the average person, don't count on it. Most of them are young egoists. Forget all these scrubs here saying how police never get respected and always 'spit on'. If you spit on a cop here in the city, you'd most likely end up being carried out of a church with six of your friends and family carrying your casket.
State troopers are notoriously famous for full searches of you or your vehicle, even if the offense was civil. Metrocops may do the same, but normally only if you are black. Metrocops usually ARE racist, and state troopers flat out hate everyone who isn't a cop. However, this isn't the true problem. The real problem is that they have the authority to shoot and kill you, whether you were reaching for a gun or your registration. Don't bother asking if you can either, because usually they are too busy telling you to STFU.
Montreals Pimpin Police Cars
On patrol in my hood.
I'm liking the yellow.
Guarding national resources.
2. Assholes about loud music.
2. "Dude, someone called the cops on my gig last night!"
Many people hate cops because of the 'pig' stereotype. There certainly are many who fit this; pushy, angry, forceful, et cetera. While it is important to be able to keep track of someone, it's not right to resort to extreme measures for bizarre reasons of 'safety' when there is no direct threat present. Also, as described before, many people hate cops because they frequently waste peoples' time with bureaucratic nonsense instead of truly protecting the people from dangerous criminals. However, this is more related to bad laws and flaws in a greedy and shortsighted system than the officers themselves.
Ex. 1: The police had a typical day; they gave five hundred tickets to irritated motorists, and arrested some kids for underage drinking at a party. (common)
Ex. 2: Wow, that police officer really saved our life! It really seemed as though that guy was going to kill us! (rare)
They are constantly harassed by the lowest form of life on this planet, yet go out there day after day protecting your sorry asses from people who are sick and tired of your shit, and who if it wasn't for the Police, would be in the process of killing you, if they hadn't already.