Maybe? I don't really consider "by using this site you agree to such and such" to be consent, and I don't know of any sites that ban ad blockers in their ToS. B

Maybe? I don't really consider "by using this site you agree to such and such" to be consent, and I don't know of any sites that ban ad blockers in their ToS. But in a theoretical situation where a site made you explicitly agree not to block ads before allowing you to use the site, then yeah I think it would be reasonable for them to expect you to adhere to that agreement.