I ran into someone like her yesterday. She was a driver though, and had MAJOR road rage issues. She scared me half-to death and I was very close to dialing 911. She was yelling at me out of her window and pointing, riding my bumper for miles etc. And this was a parent from my local high school as we were dropping off our kids!! Great example she made.
You just have to accept that there are some very angry and bitter people out in the world. I try to feel pity and sorry for them, rather than let it get to me. Some folks really need to change their lives because the current one is NOT working for them!