Personally, I'd bet it's some law that they have to abide by. Antipersonnel landmines strike me as something reserved specifically for the military, which means that civillians are disallowed from manufacturing them. Since this is a consumer item (rather than something developed for the military), the chip is disallowed in use for such military items. $10 says they have a version, or similar product, or something related to this chip that the military uses in landmines.
Either that, or the manufacturer is committed to peace or somesuch, and disallow the use of their products in military use.