If I agree with you: Yep it sure is, and that's perfectly ethical for personal and corporate use. To businesses, they have a responsibility to filter what goes in and out of their network, in the interest of their customers and themselves.

If I don't agree with you: Do you think IP/port based firewalls are censorship? That any kind of cyber-border security is an affront to rights? If not, then how do you govern access as a private organization when everything is tcp/443 on AWS? Gotta know what it's going to.