This is going to get me lynched by the mob, but the anti-police sloganeering, while fun to take part in, is based more in emotion than in reality. Everybody, in one way or another, supports the status quo. Buy anything recently? Not only did you support capitalists by buying their products, but you gave the government tax money that will be used to pay cops and soldiers who you all loathe. Do any of you have jobs? You're most likely, again, working for capitalists, and at the end of the year giving the government tax money.
Now, you're probably thinking "well that's not fair, not everybody can live outside the system - that's why capitalism is so insidious". Which, you're completely right, it's just that the logic suddenly stops when it comes to the police. Which makes sense for several reasons. For one, they're visible extensions of the state, on the front lines of the apparatus, meaning we have lots of bad experiences with them. And many of them are stupid dickheads due to the nature of the profession attracting a certain type of people. However, that they're supporting the state either directly or indirectly doesn't really matter very much when you consider that all of us do it. An argument can be made to say "well they didn't have to be /fucking cops/, I mean come on", but I could just as easily say "and yeah, you didn't /have/ to buy an Apple computer of all companies"... which you would probably point out is just descending into bourgeois boycotting bullshit. And again, you'd be right, which is my point: you've got to buy something, and you've got to work somewhere, and the police give damn good benefits considering their job requirements.
I just don't see the choices being made here as being fundamentally any different. If anything, we should be trying to convince the armed enforcers of the state to come on our side given their crucial role with regard to the state apparatus... sort of like the crucial role that us workers play in regard to the capitalist apparatus. Having the army and police go against the real enemies would be awful useful in any revolutionary situation, so it might be better for us in the long-term for our movement to not jump on emotion-filled chants like "all cops are bastards", even if we have to kick officer asses in the meantime.