No. This thread was triggered by events yesterday and two goals in the last 15 minutes is pretty good evidence that people leaving before the end did not adversely affect the Albion performance or result yesterday.
You, on the other hand, other nothing except an unsubstantiated assertion that...
Do people have to stay at nightclubs until kicking out time? And should they get disapproval from other clubbers for leaving ten minutes before the end?
If you were a player getting ever so worked up about paying customers leaving their seats before the game finished, it would suggest you were not sufficiently focused on what was happening on the pitch.