I actually see people riding on the local trail -- which leaves city limits, snaking through pitch dark 'burbs and farm country -- with a blinding blinky.

I'm thinking, like, are these people insane or do they enjoy the epileptic brain confusion it creates. Perhaps the experience harkens back to strobe lights and acid days. Yes, that's probably what they are reliving. I imagine when they get home, they must bouce off the walls.