I'm not really thinking of the recklessness that characterized the moped craze of the '70s. I definitely remember all sorts of younger people riding them as though they had the power of motorcycles and the maneuverability of bicycles, when neither is true. But you're right, I don't see people treating e-bikes that way - it's a totally different demographic.

I'm thinking more about people who just have no idea how to ride a two-wheeled vehicle in traffic. As we all know, "conservative" is NOT a safe way to ride a bicycle.