Being afk periodically is not breaking any rules listed, if anything that is the GM's call to kick an role-player from the/a role-play at their discretion.  If a kick is being put into place on the grounds of inactivity, to me that is permissible.  Killing characters simultaneously is what has happened in recourse of other role-plays (at least the ones i have participated in).  Because it alleviates the role-players of getting stuck in a conversation, event, or string of plans enveloped with that afk OC.

I do however strongly disagree with the death of an inactive's character, ESPECIALLY when their death is canon, it means if at any point they return from a real life issue that has an immediate impact on their online activities and personal obligations, they couldn't even resume after a summary.  In Wolfe's case, he bowed out from what I am understanding of what Sole is saying, others that haven't posted in an even larger window of time (Hero and doc are among these people) have characters that are still alive, but are essentially not contributing, so what do you do about them?