EDITOR:We all want the live our lives in the pursuit of happiness and we know that individual responsibility makes the joy of that life just that much better. So let's not get crazy reinventing a wheel, the solution to responsible gun ownership is already done and works pretty well.-The gun is a machine and the shooter is nothing but an operator of that machine. This whole question was addressed by how we operate our cars and trucks and the responsibility that comes with it.- In owning a vehicle you enter a social contract to exercise your very best to avoid …