I have a theory about this warning: What if when you stay too long, you also get affected by this gigantism. And that's the reason why some characters like Whitebeard are just so much bigger than normal people. All of these big people have been to Elbaf before and stayed for a long time.
Spicy favourites: I can hear it without a microphone, Roses and champagne, Passion
Mild favorites: Eternal contract, Kiss the Abyss
Mild favorites: Eternal contract, Kiss the Abyss