Let me first say, I am no supporter of Piers Morgan... but....
Judging by the unbalanced weight of opinion against Piers, I can only assume that the world has gone mad. With the petition to the US Administration, we can safely assume the gun lobby are out in force, however anybody who bothers to listen to Piers or understand his sentiment on this topic will see that his argument is balanced and sound. He is not challenging the right to bear arms only the use of modern deadly assault weapons in the name of the second amendment. I am sure many US citizens are mature enough to recognise the mismatch and the need for a different approach, lets hope there are enough US citizens who don't wait for the NRA to tell them what/how to think.
If anything I would suggest the NRA are imposing on the first amendment. The abridging of the right for freedom of speech!