"I'm thirsty, but the water stinks here"

"Come over here dude, the water from this creek is pristine."

"Wow, would you look at that, it's amazing! But did authority inspect the creek to make sure it's safe for consumption? Do we know no one peed in it? Clean water seems too good to be true. I hear criminals drink out of it. Maybe I'll stick to my stinky water for now, and see how things turn out here later"