It sounds like a sad life, if you are supposed to live it by some specific rules that make it possible to get a public sector job later on. I think if this is the situation, it is the public sector that needs fixing, not peoples' lives or Facebook.
You are absolutely free to share anything you want with whomever you choose. Just make sure you properly define who all that is and use basic crypto to keep out the unintended.
It's not the public sector job so much as the ability to participate in politics to seek change without giving a checkmate to any potential adversary who has police friends that can view any content.
