People other than you, who are not “neurotypicals” whatever tf that even means, are able to accomplish seating large amounts of people at a table and use basic table manners just fine. It’s just common courtesy.

Respect. Culture. Table manners.
Take your pick.

Edit. Personal eating space is probably the most realistic answer.

Exactly. Food on the table? Elbows off. It’s simple.

All you gotta do it hang the shirts up, guys. That’s it. Gravity is nature’s iron.