You don't want to confront them. You don't want to report them.
I realize you are mad, but if you don't want to do anything about it, you shouldn't be in here complaining about it. This might make you mad at me, but I will risk it. If you know they are doing something wrong and you turn away because you don't think you can do something...you are part of the problem. They won't stop doing what they are doing until somebody makes them stop.