Unsupervised kids. Where the hell are the parents? You are responsible for your children! 

Thugs. Punks. Losers. Mix a few of them in with other kids with mob mentality and things can escalate badly very quickly. Shocking that out of 45+ kids no one pulled a knife or a gun. Since Clark Jr. High is right across the street it makes me wonder if these are Jr High kids and if so, where the HELL are the parents?? If you kids are going to act like this now, what do you think your kids are going to do in a couple of years? Bike and coffee throwing will quickly become knives and guns and bloodshed. I know what my kids are doing. I know who they are with. I know where they are at. Not difficult people. It's called responsible parenting. 

APD should visit Clark with the footage and ID some of these kids. The school can hold an assembly or contact some parents. Hopefully even if the parents don't care, they will know the school does. Set high standards and call 'em on it when they go left.