Can the government *Constitutionally* levy taxes on books, magazines, videos or movies without interfering with the First Amendment protection of free speech?
The key to answering ALL these questions is the fact that the Supreme Court is the final arbiter of what is or is not "Constitutional." If they say it is, then it is, by definition. And that's a problem with the Constitution, hm?
Recommended reading: The Most Dangerous Superstition by Larken Rose