To give victims of police brutality and corruption and uselessness a voice.
To vent anger against the police.
Even in the songs that advocate violence, free expression of the artist's opinions and calling attention to the fact that some police act in ways that make police officers seen as Acceptable Targets among some.
A song that is an absolute paean/tribute to the police.
A song demanding support for the police.
Subverted: A song that seems to be protesting police brutality, then turns into an exultation about how enjoyable beating minorities and using drugs in the evidence room is.
The song is about the time the singer got beat up by fans ofThe Police ...for saying Every Breath You Take is a stalker song.
Zig Zagged: At first the song seems to be (and maybe is) protesting Police Brutality or the Corrupt Cop, but then it protests/complains about criminals or people who don't know how to deal with even reasonable police officers. Then the song turns around to proclaim that the way the police behave, it has made everyone a criminal and that innocent or merely stupid people shouldn't need to have special training to deal with the police and come out alive and free.
The song isn't about police or police issues at all.
The song is about police issues, but is neutral or respectful to both sides of the matter.
The song is about how cops should be judged as individuals & not as a group.
Enforced: In some genres where conflict with authority or reference to news and current events is important inspiration.
"The police suck, and here's another song about that."
"There goes the LAPD again, every time they hit someone I have a new hit single."
Invoked: The song title or primary chorus is protesting or insulting or calling for retaliatory violence against police.
To so offend and anger the police that they pursue trumped up charges against the singer/rapper/writer/band. Lots of publicity is achieved via this, and if what the police did to the artist(s) was egregious enough and obviously spiteful enough, lots of money via a lawsuit probably will be too.
To tap the feelings of anger and resentment and emotion in order to connect with the audience enough to make the song a hit, especially among those people who feel most angry at/oppressed by the police, and sometimes among those who just want to feel Badass by identifying with the outlaw theme.
The songwriter likes the police (or a specific police department/police officers) and therefore doesn't write such songs.
"Why do people seem to think the only genres that can do a song about the police are punk and rap? If someone wrote a pop song about how abusive the cops are, it might get more attention..." "That's because punks and rappers tend to have more firsthand experience than a pop idol, before she turns 18 anyway. And no one would sell it."
The album cover or track list has a title that sounds like it belongs to one of these.
The artist is discussing a new song "inspired by what the cops did, did you hear that on the news?"
Deconstructed: The topic itself becomes boring and overdone, to the point that no one wants to hear protest songs about the police, or even protest songs much for that matter at all anymore, preferring escapism in their music as to anything referencing current events or painful realities. The songs themselves are, for better or worse, seen as insulting and threatening hardworking police officers for the sake of publicity and making money off the actions of "a few bad apples."
A new Anti-Police Song is written expressly to point out bad actions by the bad cops, and includes express messages bemoaning that these guys are making it worse for all of the police everywhere and that they're ashamed of brutality and corruption.
A horrific incident of Police Brutality occurs, and for various reasons including Executive Meddling or fear of people being tired of songs about police brutality, the mainstream Glam Rap industry won't touch mentioning it. An underground or foreign Heavy Metal band has no such qualms, its lyricist finds the event inspiring - and introduces an entirely new genre to the concept of protesting the police.
I hate the cops / and they hate me / let's take all the cops with you and me / back to Anti Police Song