I think if a court enforces a judgement and a court order, regardless of how trivial it was initially, all measures including use of armed force is warranted, the matter at hand stops being the original dispute, but sovereignity and power of the law.

Does it matter that it happens over IP or CSAM? It doesn't happen over CSAM because there is no dispute there, there is no desync there between spain,the us and cloudflare.

But the mechanisms around these court orders aren't much different than those that would be used for other illegal or contentious material.

If a vendor chooses to pool and encrypt connections in a way that it is impossible to filter by hosts, and that vendor doesn't comply with court orders, then a country should absolutely block that entire vendor.

The liability of an unrelated pooled service failing is either the responsibility of the vendor or the application that chooses that vendor, not on the courts for enforcing the law without a subjective 'stopping point'.

What these vendors do is very similar to pooling in the layering phase of money laundering, but with packets: get traffic from legitimate customers, mix it with traffic from unlawful customers, pool them, and send encrypted EHLO so that the origin domain is encrypted and the packet source /destination are replaced by the vendor's. If this were done with money it would instantly trip all AML flags, but the tech world is much younger and hasn't discovered that laundering isn't cool or free as in freedom, it's a tool that the baddies use.