There's no need to advocate for anti-monopoly laws because they already exist. They just don't spend time advocating against them.
Natural monopolies are a different issue (anti-trust laws can't affect a true natural monopoly because it's by definition impossible to break up.) Some libertarians dispute that they are an issue at all, more on that position here: https://mises.org/daily/5266/ Others believe the government should handle things like public utilities, just nothing else.
Natural monopolies are a different issue (anti-trust laws can't affect a true natural monopoly because it's by definition impossible to break up.) Some libertarians dispute that they are an issue at all, more on that position here: https://mises.org/daily/5266/ Others believe the government should handle things like public utilities, just nothing else.
Accusing others of ignorance is never helpful.