Cant really say its just young people though. I see more idiots on GSXR's and R1's in shorts and t-shirts when its hot than i do on 125's.
I, myself, have never ridden without gloves. and have a minimum of boots, jeans, jacket gloves, even when its sweltering its just not worth the risk.
At the end of the day Its their own life there risking, the only thing that bothers me is the then drain of tax payers money if they survive !
You could apply that argument to motorcycling in general - even with all the gear, the chances of death or serious injury are higher on two wheels than in four. Does that resulting drain of money not bother you ?