That's not really a fair anology, because nobody is depending on you to stay in the movie theatre.
No one is depending on you to stay in the game either - A bot will take your place.
- The only time it really comes into play is if the player that quit was really skilled, and in that case, chances are he's not going to quit early.
- If a lesser skilled player left, chances are the bot will be a better teammate anyway.
- If you're in a situation where your team is getting slaughtered and having all the men you can is crucial, then a person quitting early still isn't the problem - it's the skill balance between teams.
Even in a scenario where a player leaves and causes you to lose, so what - it;s a game, get over it. You aren't playing in a league with sponsors and it's not a job.
Would also like to not e that bots can be disabled as well, so if you don;t like the idea of bots playing or taking your place, they don;t have to.