Should bicyclists be licensed to ride?

Here's a subject that will get plenty of commentary from both sides of the argument:

Should bicyclists be licensed to ride?

A few months ago I was lambasted on a forum for suggesting that bicycle licenses should return in this area. I think the benefits outweigh what some would consider "loss of freedom." With more and more bicycles being ridden around - especially when gasoline has gotten so expensive - it make sense that bicyclists should accept more responsibility for safe travel.