Nobody is allowed to shout nonsense on my lawn. I have every right to censor them by kicking them off my property. Censorship is compatible with anti-statism, because it is subjugated by property rights. There are also perfectly legitimate laws that censor speech, particularly when it causes direct harm, such as yelling fire in a crowded theater and causing a stampede that causes physical injury to people, or libeling someone and destroying their life through false accusations. Yes, there many good reasons to censor, and the free speech absolutists have an childish understanding of free speech and censorship.