2002 Stream Silver ABS. Full Traxxion Suspension.
This happens to me once in a while too. Usually people tend to stay a bit further back, I wonder if they are also riders when they stay further back. As far as what to do? I think looking back like you did should clue in anyone with half an ounce of common sense, but as you pointed out "they" are among us. I'm not sure if there really is anything we can do about it except let them around us, altercations with people in cages is lose lose for us.