If I found out they were doing this near me, I might consider showing up for Revenge of the Sith to the end. For as much crap as the prequels got, I thought Revenge of the Sith was pretty good.
Revenge of the Sith was by far the most tolerable of the prequels. I just mute the tv after Palpatine tell Vader Padme is dead. the seen actually is much better with no dialog at all.