I'm based in the US. The problem is that the US, unlike Russia, will not simply agree to allow attacks against foreign targets so long as its suits their strategic purposes. And I suppose that's for the best. In the meantime, myself and people like me simply aren't going to risk our entire careers to retaliate. I suppose if we felt strongly enough we would've joined the NSA and done this legally. I wish Ukraine the best and hope our "official" hackers are doing their best to assist or will be unleashed soon.