I think you are using racist as an extreme example of the kinds of people who stay stuff to us. Just wanted to clarify that being handicapped is not a race, nor is clown (except to purist hobbyist clowns).
But I know what you’re getting at.
No, the people who shout out to us, in part, want to let us know that they noticed us. For some reason they are compelled to interact with unusual vehicles and their riders. This is okay with me, even if they say the same old stuff.
Not counting the ego-challenged people who shout nasty things, usually from moving cars. They just generally want to advertise to the world that they have small members and don’t realize they’re telling us so.
But for the people who say “Look, a clown!” or “Where’s your other wheel?” are usually interested, and want to interact.
BTW, people make many other innaccurate assumptions about clowns, such as that they generally have lots of circus skills. Most clowns (outside of actual circuses) do not. Most cannot even juggle. In European circuses, on the other hand, clowns usually have wide-ranging skills and can make cameo appearances in nearly any sort of act.
I think people often refer to us as clowns because they don’t have a better word for “circus performer.” For many, I think “clown” covers all circus jobs. I don’t mind being associated with a skilled circus performer.
Apparently something about being on a unicycle is a suggestion that we are out to entertain people, even if we’re dressed like road cyclists and speeding along on our Cokers. When I’m riding to/from work, similarly dressed, I usually ignore such comments as I’d have to slow down to talk anyway. But when fellow cyclists wave or make nice comments on the bike path, I try to at least give a wave back, and I’ll always make conversation with someone who asks intelligent questions and is going in the same direction as me.