Cloudflare starts blocking pirate sites for UK users

This isn't part of that slippery slope, since that was Cloudflare's voluntary choice, but this is legally required of them. (I do think both kinds are bad, though.)

Cloudflare also blocked a popular Internet celebrity gossip site and actionably -defamed them in the process, and a popular blog, yet still has customers who run animal crushing sites (which is literally illegal content in many countries).

Don't defend them. Their decisions are arbitrary and it's really sad so much of the web has chosen to use their garbage services.