To be fair to the 3 players involved.....it happens over time, that a person/s come to a point whereby considering and doing something 'wrong' is considered the 'right' thing to do...
Whether it be won at all costs, the result is what matters...etc etc etc....these types of thoughts take a while to build up..to the point where they can't see what they are thinking of doing, is wrong...
It's the realisation afterwards, of what they have actually done, that is the big hit for them....
So as much as i absolutely agree, that what they did was wrong, I honestly think, a lot has to be said for some type of underlying culture, that progressively had 3 players think it was 'right' to do it.
Mark