THIS is how you do it, y'all!
As your resident role model, I suggest doing a senior "prank" such as stripping down to leopard undies while walking across the stage. You won't get arrested. You'll still be a graduate. TONS of people will see it... and everyone will love it, no matter how much your principal tries to say they didn't.
The only thing you have to lose is the ability to go to school events ever again... but like... who needs those once you're gone anyway?!?