Mythanatos:
Dynofine: I have this happen to me more than not and it’s frustrating and leaves bad taste in mouth.
Why is it frustrating? You won. In what way are you harmed?
Maybe some people play for reasons other than solely to get a win. Maybe they wish to enjoy some social interaction, maybe they hope to learn more about the game by watching their opponents, maybe all sorts of things. Maybe some people just find forfeiting rude and have an incomplete/unsatisfying experience when it happens to them.
It could be argued that staying out of the coin rooms is the best way to avoid such disappointment of course.