I do not think any US company can just deny a legal warrant from the FBI. They can challenge it (as Apple publicly did awhile ago though for a domestic matter r

I do not think any US company can just deny a legal warrant from the FBI. They can challenge it (as Apple publicly did awhile ago though for a domestic matter rather than FISA). Not sure what more Apple themselves can do, you may want to speak with your representatives if you do not want companies to be obliged to serve data under these orders.