Except then it happens on every cloudflare-protected website and you're banned from 60% of the web

"banned from 60% of the web" suggests a terrible choke-point that everyone should avoid, regardless of convenience.

Agreed, still sounds like a win for me.

I use tor and see captchas everywhere, some sites give me 403 and Youtube reguraly blocks the video and tells me to prove that I am not a bot by signing in (which I assume will block the Google Account as well). And in some cases any page on Youtube gives me 403 (and I don't even use an adblocker).

You should do this on CGNAT IP for maximum effect. I want to watch cloud flare ban an entire userbase.