Until someone proves themself safe enough to be off the no fly list they shouldn’t be allowed to purchase a gun

“Innocent until proven guilty”, is a key principle of our entire system of justice. It is not anyone's responsibility to prove that he is not a criminal, or not dangerous, in order to exercise any of his essential human rights; but rather the responsibility of anyone seeking to deny those rights to prove that the person in question is dangerous, and that there is just cause and need in that case to deny those rights.

The very existence of the “no fly list” is a blatant violation of this principle; as would be any expansion of its application to denying any other rights.