What is the worst rule in all of sports, in your opinion?

[Megbert]

I hate when the offense is backed up to its goal line. 1st and 10 at the 2. First play offense is called for holding so they get backed up 1 yard (holding happened outside end zone) so now it's 2nd and 11. Why not move the First down marker out 10 yards to the 22 yard line? Thus penalizing the offense as if the penalty happened in th middle of the field.