if there are only jesters and town in a game and there is as many jesters as townies (or more), town wins.
In other words: when there are 2 townies vs 2 jesters, or 1 townie vs 1 jester, or 1 townie vs 2 jesters, jesters loose and town wins.
What can be worse than a jester? Everybody being a jester.
I suspect there's going to be a lot of "No, I am Brian!!" now.