Ground-sharing: Should it be a taboo?

There is something of a buzz walking into your rival team’s stadium. Being in a small minority of a group of away supporters is surely part of it; you’re outnumbered, but you’re hungrier and louder as a response. Everywhere around you is enemy territory. It’s not home; it’s unfamiliar, it’s foreign, it doesn’t belong to your club. Except when it does. Some teams around the world, of course, share their stadium with one of their biggest rivals: we see this in Milan, in Rio, in Rome, in Munich a