I kinda like that one..."If you're reading this...game over"...."If you're reading this, you f'd up"...."If you're reading this, I'm at the table and you're not"....
Lenny I think sk8ordie is on to something....as long as he understands the difference between "your" and "you're".

I've made the same grammatical error before sir.....Ran a whole run of shirts on CafePress with the same mistake before I saw my error....Just busting balls Ron...please don't take it in a bad way.
I think your idea is stellar.
Mattie