My idea of what to do if a Purge event were actually called. "All crime legal for 12 hours."
I'm going to be running my ass off ripping, torching, shredding and otherwise mangling and destroying all of these damn safety signs. You know like the tag on toasters that tells you not to put the toaster into a bathtub full of water and get in, also the "do not open door while in flight" labels on airplanes, the "do not feed bears" signs in national parks. Then, I'll have a Hell of a laugh because all these other fools went round killing for 12 hours, but my gift, well it keeps going on, and on, still going.
And I could not be charged for any crime nor could anything be said against me doing it, it would be perfectly legal.
"We're arresting you for removing a sign that lead to hundreds of deaths of stupid people."
"Sorry flat foot but you cannot do that, I removed that sign during last Purge. How am I to help what stupid do without signs? And it's all grandfathered to that Purge, so I'm free to go."