To the original poster:
Feel terrible for you man. I've been shouted at plenty of times, and I've developed quite a loud "bark" to try to defend my personal space on the road. I live in the city and people definitely screw with me. It's stories like these that make me want to equip my jersey pockets with something a little stronger than Cliff Shots - like mace.
Anyway just keep rolling. Kids will be kids and they will always be idiots. I know that I was. And the only thing that matters to them is a) they are in a car and b) you are on a bike so c) they can throw something at you and get away lickity split. Simple math, really. Of course in the city these same teens become quite suprised when a) they yell at me from the car and b) I start a full out-of-the-saddle "I'm a comin' to git ya" sprint to the c) red light and line of stopped traffic ahead which they mistakenly ignored when they started taunting me. Oh those are good times good times for sure!