I think I get it, but I don't understand how the club is going to keep its non-ticketed fans or fans hoping to score tickets from other sources once in town.
If a person is going to an away game sans ticket looking to cause trouble, will it matter if the team is forced to forfeit? I suspect not.
Isn't there also an element not associated with fandom of the club that uses travelling fans or the club as a cover or excuse to further their violent agenda? I remember reading that years ago, but could be mistaken.
Where do you set the floor? If 5 fans show up ticketless to an away match, does the team forfeit? Is it 1,000? Or only if acts of significant violence occur, however one defines significant?
It seems to me to be the first step in holding athletic contests in a sealed stadium, devoid of fans with fans only being able to participate on TV and in groups of less than 10; and really what's the excitement in that? both for the players and fans.