Internet Explorer 7 Tax is fun, but here is a controversial one: UN’s global Internet tax on the world’s largest content providers (meaning Google, FB & Co.).
The whole thing has something to do with these content sites eating way too much bandwidth while being based in US so we don’t get enough this bandwidth-related money here in Europe. Anyway, if something like that goes through it might change the “look&feel” of our modern Internet as well as its openness.