What's the Problem??

I'm wondering what is the problem today. The high schoolers (the freshman, soph's and jr's anyway) have a tradition that on the last day of school they pummel each other and whoever is in the way with water balloons. This year they decided to wait at the middle school for the 8th graders. I was sitting there, watching the whole thing. They didn't single out anyone, just started throwing water balloons at anyone. Of course my darling youngest yelled at her sister, "Throw one at me!!"...anyway....some of the teachers came out and yelled at the HS kids, told them to get off school grounds (seriously, I've never seen this lady, don't know what she teachers and I've had kids there for 6 years now) even tho they were actually in the street while throwing them. I didn't see any of the kids running scared, in fact most of them just walked to their bus and ignored the HS kids. One of the girls who was driving a truck full of kids actually got a ticket! I guess maybe I've never grown up, I didn't see the harm in it....it was just good fun. Of course, I still don't see the problem in T.P.'ing either!