[bogomipz]

>"In these developing countries, great swathes of users are accessing the internet behind carrier-grade NAT."

Do you have any citations that CGN is any more prevalent in developing counties than in say Western Europe or the US? The last report from RIPE that I read indicates CGN usage in substantial in both the RIPE and APNIC regions.[1] How would IPv4 resource exhaustion be an economic issue?

>"In my experience, I’ve never had to solve more than one CAPTCHA per domain, and frankly clicking a checkbox isn’t that hard"

I imagine if you are personally "responsible for maintaining a relatively aggressive set of Cloudflare WAF rules" as you stated, you've probably become quite proficient at solving CAPTCHAs. I think people that don't mind jumping through hoops are a minority. Also just even if something isn't hard does not mean its any less annoying and degrading of the user experience. Those things are not mutually exclusive.

[1] https://ripe73.ripe.net/presentations/21-ripe73_cgn_richter....