Taxes and the like

I have been wondering about something lately. It seems more and more people who I know are for the tax on soda. Usually they say something rather mean about the people who drink it and how they are just fat and lazy and should be taxed. Here's the thing though, almost everyone one of these people were outraged when the state of TN increased the so called "Sin Tax" a few years ago. Exactly why is it ok for us to tax people more heavily for drinking soda then it is for us to get taxed because we like to abuse our livers? My gut says it's because we object to the term "Sin Tax". However I think we should simply object to all takes on unprepared food and drink. The government should not tell me what I should and should not eat, and the food police simply need to calm down. Here's an idea, let's see the government float the idea that we should add a tax on sushi because of the negative environmental effects all the fishing boats are having on the environment. Oh right...that's fucking dumb that's right.