Warn player of a Prisoner's Dilemma

In the final round of swiss, players are sometimes put into a prisoner's dilemma. A classic example is when 6 players with the same match points are competing for 4 open slots.

Each of the players realize that they can't all draw in, so they play. Two of the matches finish. The last two players are now able to draw and both get in. Thus all players are incentivized to finish last.

Or one of the matches can immediately and vocally declare that they are drawing before anyone plays. Thus forcing (or perhaps daring) the other two matches to play it out.

Obviously this is a scenario where monte carlo simulation does not adequately model the real world dynamics. So it might be useful simply to notify a player that they're in such a scenario. But how do we do it generally?