Making the other guy lose
Let's say you were going to go play in a poker game
with a rather different goal than usual. You don't care how much money you win or make. There's just this one guy that you'd like to see lose.
Where would you sit (relative to him) and how would you alter your play. Assume he doesn't know that this is your goal.
For example, when you see that he's drawing and someone else has a made hand, you could help the made hand re-raise him to charge him more than it's worth to draw.
Any other ideas? I'm not looking for any methods of collusion or cheating, but any other interesting ideas.