Well - actually I can imagine it - like I said no congressman wants to legitimize porn by making it taxable - that would be worse
What normally happens is these bills get introduced to a committee first - they get shelved there - they never even make it to the floor of the house for a vote so no one has to vote yes or no. At least thats what happened with the last one
Secondly - the fre speech part - it's already been proven that you can tax businesses online - not for the content but the revenue - but that part doesnt matter - again these bills always die before they get voted on and the other part of the bill that has to do with warning pages has already been shot down by the supreme court (called the CDA)