Do you think the military, any military, would require employees to remove their social media profiles? I think so otherwise it seems to be poor planning considering the UK military used to get their squaddies to DoD wipe their hard drives before bringing any computer equipment back from Germany to the UK in the 80's/90's.
I wonder if the Russia rhetoric is just a Cold War 2.0 rhetoric designed to stimulate economic activity and innovation, whilst testing relevant bodies in the UK. Its nearly ten years since the SEC was caught watching porn before the financial crisis kicked off. Familiarity breeds contempt etc etc.