My analogy was more about the inability to prevent invasive pollution. Monsanto's genetically modified plants do not "play nice in the sandbox" -- meaning that they don't keep their mutant genes to themselves. Rather, their genes jump around to other plants... the non-GMO crop fields of other farmers, and even to wild plants that are ancestral to modern crop plants. So, the wild and domesticated gene pools of plants are polluted and altered and there's nothing farmers or conservationists can do to stop it. Sort of like secondhand tobacco smoke -- We can choose not to smoke, but we can't always have the power and control to prevent others' smoke from drifting through the air and into our lungs.
Sugary drinks affect just the person drinking it, the sugary liquid doesn't drift over into other people's mouths.
