Bathrooms, demons and weird wall hangings

I like unique and weird stuff according to my family and it looks like Etsy has caught on to that fact, because why am I minding my own business on Etsy and the I get recommended a wall hanging that reads:

“Please do not summon demons in the bathroom”

 I'm laughing and I'm like maybe I really need to buy this plaque because it’s great and would spook my family and friends, but they know I'm weird. I'm also thinking who are these people who have friends or family who summon demons in the bathroom? I really need to meet you so that i can understand but then again maybe i do understand! Let me explain.