I've got about 800 miles on my bike now, and almost all the comments I get are positive.
What bothers me is the people who *don't* comment. That is: the people (invariably in gigantic SUVs) who feel like they should be faster than anyone on any bike, let alone a beach-cruiser like mine.
Off the line, I get to 20 or 25 mph a hell of a faster than they do, and I can slow for stop signs in a much shorter distance, not to mention accelerate a lot faster. Yet some people just have to pass me, no matter how unsafe for me or anyone else not protected by four tons of steel.
In Chicago, there's something of a civil disobedience movement called
Critical Mass. The idea is that once a month there is a mass communal bicycle ride through the city involving hundreds or sometimes thousands of cyclists that disrupts auto traffic along the route, delaying traffic for several traffic-light cycles at every intersection they pass through.
I'm not convinced it's the right tactic, but there's no doubt that the movement has raised the profile of cyclists' right to use the city roads. I rode along a couple times this summer, and the reactions of Chicago cyclists to my vehicle have been overwhelmingly positive. As far as I could see, I was the only one on an electric on each ride, though I didn't stick around for the party at the end.
Still, I can say that the positivity of comments I hear about my bike are inversely proportional to the size of the vehicle driven by the commentator. In other words: the only negative comments I get are from people driving obscenely large vehicles that are themselves too big and too heavy to be responsibly driven on city streets.