Back in 1502, when Malleus Maleficarum was still in print, people understood that you need to collect and burn any DNA-carrying items your body might shed. After all, you wouldn't want a witch to get hold of your toenail clippings, hair from your hairbrush, spit from an envelope, etc.; the part carries a link to the whole, so you could get cursed. And if Bell's Theorem is correct, you could get cursed at the quantum level! That would certainly be very bad. You know, we should probably burn WIPO Director General Francis Gurry at the stake, just to be on the safe side.