Meh I did Timpani for three years moving a cart about half a mile with flat tires... I admit the pit doesn't do much marching, but I'd also like to add that we do provide a valuable role for the band. The pit has the power to clearly define an arrival point in the music. Regardless of their physical contributions to the program their musical additions are vital to almost all shows. My senior year I marched snare in which I was probably in the best shape of my life, but the argument should not just be limited to pits physical ed.
I've seen some schools with some shows where each band member covers only one square part of the field, or shows where the band plays and marches the fastest of 140 clicks a minute (Note I've seen LD bell do marching block at 240). Why isn't there an argument about the difficulty of drill? Consider this if an argument is made about how much a section of the band exercises there should be another argument about the distance traveled by each band member divided by the time it takes for them to get there to truly merit their PE credit.
The point I'm trying to make is the argument is arbitrary the pit may get their PE credit but you need them, and if anyone here truly feels that they deserve their PE credit just because they marched for a semester then continued to sit in a chair for the other, I recommend you get off your high chair and look at the difficulty of other high schools or the duration of their season in comparison to yours and then truly re-evaluate the amount of work you did. If there is any one else who's program has placed consistently in the top 12 in BOA and State I will be happy to hear your argument about why the Pit should not earn their gym credit, but as long as I continue to see posts with programs I've never seen at State Finals of BOA San Antonio Finals, I will regard their arguments as being unaware to what other programs are doing.