Insisting that kilt wearers wear underpants for decency's sake is not all that different from insisting that women wear full-coverage bras for decency's sake. Is anyone still doing that? (Well lots of people who have breastfed a child, yes, but that's not for decency's sake.)
I think kilt wearers should continue to provide hilarious animated gifs for the sake of the internet.

Neat idea, though recumbent bike + skirt + transparent pod makes it a little less friendly to the "I don't want to show you my underpants" set.

If this were actually installed somewhere, the first thing I would expect to happen is that groups of kids would get four or five of them linked together, try to hit 80 or 90mph with drafting, and then wander around the system griefing the normal riders ahead of them by coming up behind them and pushing them from 40mph to 80mph. At least, if I were still young and a jerk, that would sound like fun.