Integrity isn’t just about doing the right thing when nobody’s watching; it’s also about being mindful of the consequences of your actions. Heck, I’d say that’s the more important side. You might start dumping chemicals into the water without treatment because it’s cheaper and there’s technically no laws against it. But you’re still going to be physically responsible when everyone who lives there starts miscarrying every single pregnancy and the town is abandoned because of your misdeeds.