Satisfaction Guaranteed

It was 7:00am on a weekday and i was walking past a school bus stop. There were a few kids standing around waiting for the bus. I didn't think anything of it. Until one of the boys, around 8 years old, began gesturing inappropriately at me and yelling, "satisfaction guaranteed!" over and over. He kept making the jerking off gesture with his hand and thrusting his body back and forth while looking at me. I attempted to walk by but he just followed me up the block, yelling and thrusting. This boy could not have been older than 8. Finally when i had enough and got the courage to say something i turned around and said, "do you even KNOW what you are doing?!" He said, "no, they told me to do it!" and pointed to the older boys standing back at the bus stop laughing. I told him what he was doing was very inappropriate and disrespectful. His eyes swelled up with tears. He was clearly scared and did not think i would reprimand him. I so badly wanted to talk to the older boys and call their parents but i didn't think it was my place. The whole experience left me feeling dirty as well as disappointed in our youth.