the helmet issue is, I think, left best to the individual- if they have anything to protect, they will wear one.
I went thru the girl's other images- lots of pics of her boyfriend doing stoppies, wheelies, big crotchrocket fans they are. Naive, stupid, whatever the case, in all the other pics they are both wearing full gear. Never saw anything but full face helmets. Odd how, on the one day they dont have proper gear, he decides to haul ass.
When she is forty, and those scars really start to tighten and she's paid tons for plastic surgery, maybe she'll ask herself if it was all worth it.