I ride a bike route daily that functions for all practical purposes like an MUP, but without the peds! I see all manner of bike lighting coming towards me but tbh I can't say that any have blinded or offended me. The 4,000 lumen HID lamps in late model blinged out Japanese and European sedans, and worse, the lifted trucks with the HID's at head height! They take my breath away. I've been behind the odd cyclist with a real dazzler of a rear flasher, but I know my own PB Superflash is nothing like that. My MagicShine 808 is usually mounted on my helmet. I take pains to keep it out of people's eyes. I've never been flashed at. The odd ped has yelled in the past but really, MagicShine type intensity is no big deal these days. Five years ago, yes, they were ungodly bright, but in 2016, not so much.