Yeah. Good luck with those stickers. They will be magnets to the customs people to use a freaking chainsaw to open the package. In opposite-land where all those shipping people live and work, you can count on them ignoring any warnings. Haven't we learned our lessons with the Fragile stickers?
Personally, I want a "This product was machined by a Hepatitis carrying, HIV positive, accident-prone hemophiliac. Open at your own risk." sticker.