A specific sales tax on newspapers is also cost of doing business. But it is unconstitutional. Making the law really complicated so that it's expensive to follow is the same thing. How can I make an online community and sell ads profitable (like some people I know that ran profitable forums) if I have to vet ads and follow laws of fifty states? The result of such laws being enforced is, these online communities cease to exist, and people aren't able to talk to each other.