edit Apparently some jurisdictions around the world use the term "moped" to refer to small motorcycles even when they don't have pedals: https://en.wikipedia.org/wiki/Moped
Example of a 50 cc Vespa with pedals:
https://vespasmallframeforum.proboards.com/thread/7725/vespa...
[0] https://nl.wikipedia.org/wiki/Puch#/media/Bestand:Puch_Maxi_... [1] https://nl.wikipedia.org/wiki/Spartamet#/media/Bestand:Sachs...
Also (and I think more notably) the DMV does not require registration in most US states.
There's a fair number of people who end up on them after getting DUI's as well (although technically this is not legal since you're still required to have a valid driver's license almost everywhere... but they probably don't get caught that often).