The courts have interpreted obscene materials to be a form of speech, and therefore the legal position on obscenity is related to the First Amendment to the Constitution. This amendment has not been interpreted to protect all speech.
Some speech is considered to have low value and can be regulated or banned.
Obscene material is one category of low value speech, along with libel, slander, profanity, false advertising, and others. It is low value speech because it has no social importance since it lacks literary, artistic, political or scientific value. I can present a philosophical position that informs my suggestions about obscenity and the Internet, and then elaborates those specific recommendations.