Beater with a mirror

i think they are downright dangerous, should be banned, AND banned from motorcycles too so the lazy fckers have to do the proper safety checks. can't you use that extra eye in the back of ya head that all city cyclists develop after a while?

Mirrors are only dangerous in the same sense that full face crash helmets are dangerous - they limit your field of vision. Motorcyclists (and I'm not one, never have been) can't turn to see what's right behind them while moving forward as their peripheral vision is often blocked by the sides of the helmet. Mirrors make more sense on a motorcycle for this reason, but you really don't need them if you ride properly on a bike.