sorry, I was just joking around :-)
honestly, I don't know the exchange that took place or the context of it, but contacting the club the guy rides on is the way to go. tell whomever you contact the name of the rider if you can, or if no name, description of rider and bike, they can probably pick him out if he's an active member rather than someone who still has a kit from several years ago and is no longer on the squad.
I wouldn't go into how they disturbed your interval, that's kind of just fred noise, but if they were spouting off insults without knowing you, saying things that were offensive, and essentially harassing you (and others), i'm pretty sure that their club would want to know.
you know that I'm in a team captain role, so speaking as someone in a leadership position on my club, if it were someone on my squad, it reflects poorly on me. I'd want to know so that I could address it and nip it, now.