I've worn a cap for ages, but now that some Belfast cyclists have big f-off helmet lights and, of course, these are pointed right in the eyes at a dark greenway I may have to wear sunglasses at night...
I dreaded going through Richmond Park for that reason, every single fucker insist on turning their light all the way to 11, and pointing it directly at the moon.
cycling cap work well for that, and to stop getting dazzle by idiot with powerful light.