[mc32]

Not all cyclist ride one speed "gentleman/lady" bikes. Many travel upto 30mph. That's a safety concern. There have been a number of cases of cyclists running over pedestrians resulting in serious injury, so it's not inconceivable to require licensing.

[squiggleblaz]

Licensing doesn't stop people driving cars from charging into others, killing them. It's not going to stop bike riders who are inclined to drive with such recklessness that they endanger their own life from driving with that recklessness