"citing court order" to me as a non-legal person indicates that it is one they received. I hope you don't expect this non-legal forum's headlines to be parsed like legal text? How does "citing" indicate it is not an order Google received?

I merely gave my opinion as a non-legal casual news reader. To me at lest this new headline conveyed what happened more clearly before I delved into the article.

"citing a court order against ISPs" would be sufficient, I think.

As a non-native speaker, the difference between "citing" and "per" would have me confused. The HN title is much more explicit.