Not that I work the area in question, but I would not issue a traffic ticket based on a another party's statement alone. There would have to be an actual collision, and a ticket issued based on statements and evidence. A non-911, non-emergency call might be understandable, but such calls placed against members of one's own group or club is an unhealthy form of social interaction, akin to cannibalism. Edited to add: FWIW, I don't remember ever ticketing a cyclist for not coming to a complete stop, unless it was a crack dealer or pimp; I will use any legal means to detain those bozos.