Yes, with some exceptions for actual copyright and the like.
>Do you not believe in any IP law?
IP law, yes, but I don't feel a user's entries into a website automatically qualify as IP owned by the user. The terms of many websites actually say that whatever you upload to them is owned by the website, unless a prior IP applied to it. I've only ever heard the claim that your name et al. are your inherent IP from "Sovereign Citizens" before.