I've had a player mention the 3 turn rule in the past- but it wasn't referred to as a rule, just 3 turns warning, and it wouldn't matter anyway, I was boxed in between him and stronger players. Still nearly won though, but the truce wasted a few turns completely for me and probably could have saved ...

Oh my god, they are such little b_____s. Why won't they lie down and let me grind them into dust at my leisure?

Frankly, because it is boring to lose. It is worse to have to summon the strength to put down three paltry units for a week, with no conqerable territories nearby, waiting on the whim of ...