I think you have something there. At least with the US Post Office, nothing like a match, flammable at all, can be legally placed in the US Mail. Now that does not mean someone else would not be a carrier...but US Mail, no.I'm not a lawyer, nor do I play one on TV. But if I were the Danish hatter, I would hire one to look into whether or not it is legal for Mr. F to ship his hats, containing his incendiary "signature", overseas. The USPS prohibits mailing matches of any sort internationally, but I'm not sure if other carriers have the same restrictions. If the answer is no, I'd pay said lawyer to file paperwork to try to prevent Mr. F. from selling hats with the match included in the European market, if not everywhere outside of the U.S. of A.
If that was successful, I would then have the lawyer challenge Mr. F.'s international trademark on the matchstick behind the ribbon on the grounds that selling a similar product with a similar signature in Europe wouldn't be competing with Mr. F.'s ptoduct as he was not allowed to sell in that market.
I have no idea if any of that would fly in a court of law, but if a matchstick can acquire a new "meaning" by simply having a couple of people state it is not just a matchstick anymore then it's worth a shot...
As to the "look" of placing a match and legal issues about it, come on...that is insane.