I had never heard of this before until the recent problem in PA. Apparently the young people put up notices on Twitter to head to a certain part of town at a certain time and they kind of raid the place. At first it was just for fun then it all turned into a riot of sorts. Smashing shop windows, jumping on top of cars, beating women and men for fun, etc. I googled it in our area and see we have also had some problems with this new fun game for teens. Down in Pioneer Square for one and I think some of Malls. So if you see mobs of teen invade your space, turn on your heels and get the heck out before you become their entertainment. Hard to protect yourself from a mob and if you do pull a gun and start blasting away you will not be viewed well by any Grand Jury.