You all are making me feel like a bad parent here.

I never jumped when DDs came home and told me about some kid that was mean to them. I stayed objective and tried to get the whole story from beginning to end. I always wanted to make sure that what ever the "incident" was that it truly wasn't my kids fault. Sometimes it was and sometimes it wasn't.
I certainly have had my share of calls to the school about a couple of girls that were bullying DD17. These girls were mean not only to DD17 but others as well. The school just didn't do anything but since I knew the both the girls parents, I finally called them myself as it was getting out of hand and starting to get physical. It worked. The bullying of DD17 stopped; not sure about the other kids. Additionally, one mom wanted to pay me for the lunch money as well as lunches her daughter stole from DD17. LOL