Another thought experiment:
1) Cop on a horse
2) Cop on a motorcycle
3) Cop on a mountain bike
4) Cop on a Segway
I've ordered them, I think, from toughest to dorkiest. Maybe you could swap the horse and motorcycle (though horses are huge). But is there any doubt the Segway is in last place and by far?
Have you seen the Segway tours? http://bit.ly/4J4yJ
Throw some dubs or spinnas on those bad boys, and they'd still look like dorks.
edit- But I do agree with your list. Horses > motorcycles, for sure.
That Segway tour pic is pretty funny. It may be the helmets and manpurses, but funny still the same.
Funny, personally I think that cars with spinners and huge rims looks quite a bit more dorky then Segways.
The big difference between the two is that the Segway never had a sufficiently counter-cultural fan base, and therefore had exactly the wrong sort of exclusivity.
Case in point: http://www.youtube.com/watch?v=geIsWq5xOSE
Scraper bikes are all over Oakland. Do they look cool? Nope.
I would buy a Segway if it looked like something from Mad Max.