Right now it's 16 players logged in, but most probably not all of them are active.
LoL. I wonder just how much AH is used as a $15/month chat room.
Maybe the roster should add a column for player "Activity" and "TIA" (e.g. Time in Activity). Nothing that would give tactical information. Just like "In Fighter", "In Bomber", "In Ground Vehicle" , "In Field Gun", "In Tower".
Maybe let social dynamics handle the whole tower sitter ENY drag situation. Rather than code a rule, let visibility and social pressure work. Maybe a team mate asks why someone has been sitting "In Tower" for 6 hours.