As a city girl, I find myself surrounded by a variety of motorcycle / scooter riders. I can honestly say that I've never seen people ride the way they do here.
I've gotten used to seeing the whole No Helmet, No Gear thing, given PA's lack of a helmet law. But what is really annoying is the lack of motorcycle etiquette (including scooters) that I'm used to experiencing. In addition to general lack of pedestrian and driver safety really. But I suspect that sort of thing is common in most big cities.
Tonight, I was riding home just a few blocks from my house about to pull into a gas station on my right. I'm going maybe 10-15mph and these two bikes pass me on the left inside my lane. I've NEVER had that happen when I rode in San Francisco. Ever. The one time I had someone pass me on the right while out riding my ride leader yelled at him for being such an ass (and doing that to other riders as well, not just me).
The attitudes about motorcycles and scooters here are far less serious and seem whimsical at best. I guess it's a difference in attitudes that are specific to this region. I don't know.
But what I do know is that I'll never be ok with it. And if you're one of those people who like passing your fellow motorcyclists in their lane WITHOUT permission, you're not only risking my life but yours.