Jim, isn't the membership of this forum open to all who want to join, regardless of country of origin? Seems to me we have Americans, Russians, the Brits, various Europeans and a number from down under. Without defending the essence of King's post, why wouldn't he have a right to try to influence the membership?....
You might consider that the subject matter is about serious regulatory penalties against Americans, not forum members. A well intentioned US citizen may face headaches for sharing with a Canadian about the inner workings of a gun, or load data for a solid hunting round that could be construed as armor piercing.
