i think this would be gay since in general my ideas suck, but here goes:
senior class Islam day. Everybody converts to Islam for the last day of school, getting on the ground to pray facing mecca in the halls and during class, wearing sheets to school, and telling everybody theyre going to hell if they dont convert..... youd probably get fucked with people calling you out for racism but itd still be decent and doesnt require much physical stuff to gather in a day