I believe that's exactly what shouldn't happen. There is a serious problem that goes far deeper than a few out of control youths. It's a problem with the way we deal with young people. It has to be since adults are responsible for how children grow up, not the children. That isn't something the police can (or should) fix. It's up to all of us.
I don't think we should be reassured. I think that's the worst thing that can happen. We need to change things, and we ALL need to look at whether there's anything we can do differently. Waiting for the police, the council, or the government to sort it all out can only work if we are prepared to live in a rigidly authoritarian police state with no privacy and precious few human rights.