While watching parts of a soccer match, it hit me that it seems fans in all other sports except baseball have to give the ball back if they catch it while in the stands. Is this correct, or do any other sports allow you to keep it? Does it matter how far up in the stands the person is? What is the reason you can keep it in baseball- because they’re smaller and cheaper? And what if you refuse to throw it back, do they forcibly take it from you, or arrest you?
Could baseball for example pass a rule that states on the ticket that any historic ball must be returned?