TBH it is not ALL cloudFlare IPs but a significant quantity of sites using and not using CF CDNs. You cannot imagine what a pest that is even for legit users of legit collateral damage pages. CloudFlare is in the courts appealing/countering initial court allowance to blockade and ISPs are bound to comply to blackout requests. You can look at https://hayahora.futbol (traslation: is there soccer match now?) to see affected domains.

While I am not some reputable source per-se, I have some tailscale presence over there and can corroborate my exit nodes find cloudflare sites blanket blocked on weekends.