Making somebody pay a penalty is ridiculous.
Quote:
it was a 6 hours session and anyone can cash out wheever he wants
I don't like ratholing but unless your game has a policy that people can't re-enter without matching their previous stack, what he did wasn't that much out of line.
He should have said "alrighty guys, I'm going to cash out. If you want me to come back into the game with a lower amount of chips I'm willing to do that. Otherwise I'll just go home".
Him doing it secretly isn't OK but the correct punishment after the fact is to tell him to not do it again.