They could get attempt to fight the court orders in a court more open than the FISC? I'm not sure how this could practically be accomplished, but it would be a good first step towards protecting the rights of users, instead of blindly complying with court orders that Google would hopefully have some moral problems with. I always find it so fascinating that tech giants will lobby for increased access to their services worldwide, but not more secure services here at home.
No they can't. They can fight the court order in FISC, but once the FISC process resolves, they will be required by law to honor the terms of the court order; they could then fight in other courts --- as I understand them to be doing to some extent --- but that would be a post-facto effort.
