No, I like the unpinning. I was to ask the technical side of it. What if I make a banner topic, they X it. After the event I unlist the topic temporarilty. But then one month later I reenable or pin or banner it again. They may not be following the category but this very topic hence I would not necessarily want to drop it and recreate it under a new ID next month.
Regarding notification, any (but the badge will do), after I edit the first post? I guess that is not grounds for a notification.