I think they’ve been banned, but this one was on Broadway near Draper Labs both yesterday and today. The controversy I’ve heard about is a public safety concern: where should they be allowed to park; how fast should they be able to go on the sidewalk; how slow should they be able to go on the street…
But having actually seen one, I think theres a nuisance concern, too. This one has an annoying beep, and the message just says “rent me”, not that it’s in any kind of distress. Maia finds it annoying, too.