If you’re talking about single match tickets, then they should have season tickets if they want a guaranteed seat. If it’s season tickets, they should have got them earlier. They can’t complain because the seat they want is taken. I don’t see that as inconvenience I see that as people shit out of luck of their own making.
Edit - I kind of see what you’re saying now. It’s not an issue of seats, it’s an issue of dealing with our numpty fans.