[Glenn E. Meyer]

Do you need mandatory training to vote?
Do you need mandatory training to print a newsletter or start a web page?
Do you need a mandatory class in comparative religion to choose a faith?

Mandatory training for a basic human right is an interesting concept.

Certainly electing an idiot might cost more lives than the number of gun accidents by untraining CPL types.

That being said, I think you have a moral responsibility to try to be competent with a firearm, understand legalities and moral principles related to taking a life if you intend to use it in circumstances that might injure an innocent or overract to an incident.