Do you think that all of the 30,000+ season tickets holders are attending less than 66% of the games currently? I certainly don't. Most may miss the occasional game for the reasons you've discussed, but its unlikely that most will miss 7 out of 19 games for those reasons. As I said in an earlier post, the majority of those will be known well in advance of the game so there is no reason why you couldn't pass on your ticket or list it on the ticket exchange. I'm not saying you have to attend it yourself, just dont leave your seat empty ffs. If the threat of losing your season ticket was introduced, I can guarantee it would be a few hundred at most, and I think the administrative burden would be worthwhile. The majority of those will have a justified explanation.