So what if the Kottonmouth Kings sing "motherfuck the police"? The pigs are the ones voluntarily enforcing this prohibition, and should not be let off the hook simply because they are following orders. They could easily choose a different occupation which does not involve infringing on other people's freedom.

Also, you have to remember that the Kottonmouth Kings are anarchists (for example, in that very same song they sing "Abolish government, it's nothing to me"). We anarchists, who are opposed to all hierarchy and authority, all structures which use coercion to force others to live according to their principles, we who believe that people should be free to do whatever they want so long as they don't infringe on others' freedom, are obviously in opposition to the violent techniques the police use to enforce rules imposed on us by the rich and powerful elite in control of the government. If you don't want to hear anarchist principles sung, don't listen to anarchist bands. If you want a song which advocates abolishing marijuana laws but keeping other forms of oppression, you're listening to the wrong people.