If I could kick people in the face I'd get "You're Fucked" tattooed on the bottom of my foot. That'd be pretty badass in my opinion. I don't know much about tattoos, but since everyone seems to indicate this is a bad spot to put one, why not just not put it there. Like jung point out, if it's not visible they should accept you. If you're really unsure can't you call them and ask what places are considered acceptable?