>It's the principle of the whole thing - I don't think there should be anyone telling me how much I'm allowed to eat or drink. Same could be said for smoking I suppose - but you can't get second-hand pepsi sugar either. As you said "political stupidity at its finest.".
It's rather the principle of political correction - let's do something that won't change a thing, but will create an impression that we're taking serious steps.
In the same spirit, may I politically rectify your sentence? It should read "but you can't get pre-owned pepsi sugar either".