I had the same conversation with my peers at a swim practice in high school. We were swimming a set of 100 yard repeats and a tired someone wondered, "What can Coach do if we ALL swim slow?" And so we all swam slow. Coach decided we should do a VERY long set of mile repeats instead. In our rebellion, we traded discomfort for genuine pain. We never tried to rebel again.
My school took a different route. We simply gave the seniors a Senior Skip Day. Rather than allow the chaos of student led rebellion, someone must have negotiated a deal where the Monday after prom became Senior Skip Day. It's now a planned day on our calendar, one senior privilege among several others. A lot of schools have handled it this way.
Once in a while I hear a senior say that they should skip another day (never a different day, just an additional day.) I always give them a stern look and the idea dies a quick death.
It reminds me how fortunate I am to work at a place where the kids are pretty darn good.