I think there's plenty to think about with relation to little cheap substandard cars, but I would suggest that, dangerous as they are, motorcycles may fall into a different class. For one thing, the users are a fairly self-selected group. They do not expect that their motorcycles will be cars. They are also generally, if sane, willing to don protective gear, and in many places if not most they are road tested on actual motorcycles, so they are expected to understand at least the basics of how such things go, stop and steer. Generally speaking, also, at least here in the northland, people do not use motorcycles very much in the worst weather, whereas tiny cars are likely to see a lot of use in snow and ice and heavy rain. People of a certain age who do not expect to be able to balance on a motorcycle or to handle it, don't generally go into that market.
Licensing little minicars as motorcycles helps some, but it won't do too much if the drivers don't really understand that they're riding closed motorcycles, not odd little cars.
I would think especially after the past year, it should be obvious that there are a lot of people around who do not understand a lot of things, and who do not take risks seriously enough.
If people start getting lax on safety issues, start taking their kids to school, driving in the snow, and so forth, things could get pretty ugly.
