A simple shrug to that. I had considered that possibility, but if that is the case, there is no harm in popping into activity to reset the timer.
I'm sure the folks up there can make it so that chatting counts as activity.
But in general I see more cases of what I am talking about than people just chilling out. Once again, they are there so they should have no problem entering and exiting.
Now a longer time would be necessary considering wars are a thing.
So . . . an hour would suffice.