Ok, let's suppose it's not illegal to send the data to the US because of the safe harbor act. What is the legal ground that prevents me, let's say, uk employee

Ok, let's suppose it's not illegal to send the data to the US because of the safe harbor act. What is the legal ground that prevents me, let's say, uk employee of an UK subsidiary of an US company, to tell the press that my UK company has been orderd by it's US owner to hand over private data to the US. I mean, I cannot be possibly forced to abide by the FISA warrant, right? But can my company be in trouble (and hence fire/sue me? *) for this kind of action of an employee? I mean, how can the US law hold responsible an US company for an non-illegal action performed by a non US employee of a non US branch of that company?