[varoadstter]

I think some have missed the point of why this is bad so I will now elaborate:

You did indicate that there was no signalling or whatever before you and your buddy got heads up. Fine, that's noted. The problem is that if you and your buddy have this "understanding" about how you will not bust each other then you have an edge over the other players in the hand while there are still others to play. You and your buddy can even attempt to trap opponents between you (as indicated in your post). Only when the other player folded you called it off as there was no money to be made from others.

This "understanding" has a definite effect on the other players at the table as they don't get the same benefit as your buddy does. This is why this is colluding, cheating, etc. Does that help anyone who's still unclear on this?