Just move to southern Oregon where the Niners are the regional team and you can get them and the Blazers on your antenna for free and aren't forced to watch the shit birds!
If they leave I'm definitely not following them, i'd become a very very casual Kings fan because they are almost as close as the Blazers are to me living in southern Oregon but I probably wouldn't get that into them or watch any games. If Seattle steals them I'm probably dropping the Mariner's...