I'd hate to "profile"- but indeed, sometimes the bike and rider are a painful mismatch. Usually the purchaser of a high end bike who is doing it the standard way has this idea about becoming a higher-end rider, after all

I do remember the time I had to break a chain around a bike and put mine on it... and I didn't want to litter with the chain so I stuffed it into my backpack, not realizing that the broken part was dangling out.
I wondered why that driver behaved so oddly, honking at me in that 'excuse me, did you realizing you were losing soemthign?' way and then peeling around me and driving off... \

I'd be tempted to take a picture of a suspicious combination (if I could do so without putting myself at risk) - 'round here, our bike discussion list sometimes has posts when a bike is swiped.