There is already a tax on tobacco and alcohol why not...  This is not an argument. I could say, "Speech which creates a clear and present danger is banned, so why not ban hate speech?" You're basically arguing that since we are already at point X on a slippery slope, we should continue to point Y. This line of reasoning could continue on indefinitely. I don't agree with sin taxes on anything, and I especially don't want them expanded to include anything else. Government should not meddling in the business of what people buy at the grocery store.