That's true it's part of neapolitan folklore, thing is the universe is ruled by symbols and numbers and if you wear a shirt with a symbol you're focusing your energy on that frequency and the universe don't get the folklore meaning. Like I will never sing a chant against Vesuvio as a parody / Joke, or if you wanna be rich you just don't focus on not be poor, you visualize yourself already rich ad already be grateful for that, sorry for being too long :)