This is only a hypothetical, and would be just in protest:
1. Take a couple of laxatives before-hand, or hold in a load--whichever floats your boat.
2. Wait until you get in line, and right after the person ahead of you gets let go, and you are beckoned, shed all of your clothing, and start shitting everywhere...that way, they REALLY know you don't have anything.
3. Molotov everything.