In my past experiences with people with a lot of face piercings, they are constantly screwing around with their piercings, taking them out, spinning them around, itching them, sticking their fingers in their mouths, noses and ears (depending where the multiple piercings are) and I find that quite disgusting if they also happen to be making my food.
Several times in the past, I have refused piercing contaminated food and called over a manager before on nasty employees I saw fingering their piercings without washing their hands doing food prep, and I will no doubt have to complain about it again in the future, if I notice it again. So, if I see a multiple pierced hepatitis hippo making my food, they better keep their hands off the face and be wearing gloves, like some fast food joints require workers to wear.