Why is it deterred by blood?Everything it eats is full of blood.This lizard makes it's own gravy.Stop this large hadron collider nonsense, and build a hot dog that shoots ketchup at me.
To answer the original question, and I had to do some hard thinking about this, but it's sort of like if we were about to go to war with North Korea and we nuked Alaska. Then we'd be like, Hey North Korea, if we'll do that to ourselves, what do you think we'll do to YOU?!
If a hot dog hosed me and my best Sunday suit down with ketchup, I would freak the holy living fuck out. And even after you sat me down and explained it was just ketchup, and that both it and the hot dog were completely edible and harmless, you know what? I still think I'd seek out food that didn't make me shit a brick.