Hmm I don't use mirrors so can't comment on the functionality, but the bar end type have to be the least Fredly. It's just a replacement bar end. I don't notice them right away. The also look the most solidly attached. The helmet / eyeglass mirror on a little stalk just screams Fred. I would never judge anyone for works for them to be / feel safe on the road tho.

Mainly I try to avoid busy roads / rush hour / roads with no shoulders. Obviously this doesn't work for everyone (or me sometimes). I do try to keep heightened senses (hearing helps) in traffic and look over my shoulder regularly.