Doug, even though I believe this will have a BIG effect on foreigners like me who want to visit the US on occassion, I think that any email or communication from a foreigner will be tossed in the waste basket faster than you can say Jack Rabbit! In fact, foreigners will likely be more affected than Americans will be. In my experience, foreign opinions mean nothing to the bureaucrats. Therefore I have chosen not to submit any communication to Customs at this time.
I will however do plenty of walking with my feet! If during my next visit to your country (visiting relatives or vacationing), I get any flak from your Customs agents for having an American designed and constructed Spyderco pocketknife, I will simply turn right around and deny any of your hard working merchants my hard earned money.
Best of luck with your appeal to the common sense that somebody in Customs might actually have.