Yes, you are wrong. Let me explain. GP laid out his principle above: "If your app is known to be uses heavily by criminals ranging from Pedo's to drug dealers

Yes, you are wrong. Let me explain. GP laid out his principle above: "If your app is known to be uses heavily by criminals ranging from Pedo's to drug dealers. You are liable." He doesn't say that doing "jack shit" (not exactly a fleshed out legal term) will remove that liability, as you are suggesting.