Point is there will be ALWAYS someone who gets pax, even if the cc are on the ball- as there are plenty of other things to be looking at during boarding as well. Often, you don't realise until after they walk off and the alcohol smell wafts up. In which case it's seat number noted and quiet chat prior to t/o.
LRH Someone who gets pax what?? and they walk off??? and a quiet chat?...did you start flying yesterday?