What nobody mentioned was chemical agents (pepper spray). With the spray a group is easier to hit than an individual. The spray and spin works with a group of teens as well as it does in the middle of a bar fight. Just be aware that you will get some too as at least part of the spin will be into the wind.

Just be sure they are a threat and not a lost church group looking for directions. You will know the difference. Lost or other legitimate groups tend to stay together while predators spread out to surround victims. It was also a good idea to start with the biggest or the obvious leader of the group.

Take Care and Stay Safe