Pray tell, how does this lower the "barrier to entry"? Are we presuming that terrorists are stone deaf, nearly blind, and incapable of memorizing daily aircraft

Pray tell, how does this lower the "barrier to entry"? Are we presuming that terrorists are stone deaf, nearly blind, and incapable of memorizing daily aircraft routes? If so, I agree with you, and further suggest banning iPhone-holders for Stinger missiles.