Whenever I'm given the choice for more or less government regulation, I'm going for less every time.
So am I. Normally. The problem is that any effeminate douchebag who has a pair of neon spandex, a bike, and an elitist attitude, can ride in traffic, disobey the rules, create a safety hazard, and disrupt traffic.
A license would at least provide some training requirements so they know the rules and help impart some responsibility, just as required by everyone else who uses the road. It's no wonder these assholes think they're above the law.
I'd love to bike to work if there were lanes available so it was safe. As is, I would be causing a hazard and selfishly disrupting everyone's commute.