> I think the problem is closing the window shuts down the screen link but not the whole pairing session, but people don't realise they need to separately end the call.
Ah hah! This is totally it. Closing the screen share does not end the call (intentionally). I can decide I don't want to see your screen any more, but still want to talk to you. Definitely a debatable design decision, though. It actually used to work the other way.
Sorry, didn't mean to imply you were :)
> I think the problem is closing the window shuts down the screen link but not the whole pairing session, but people don't realise they need to separately end the call.
Ah hah! This is totally it. Closing the screen share does not end the call (intentionally). I can decide I don't want to see your screen any more, but still want to talk to you. Definitely a debatable design decision, though. It actually used to work the other way.