I've shared numbers openly my whole life, never had an issue. I understand why company policies exist though in our own company, we never implemented any such rule. As with the rest of the world, I've never not told. If anything, it irked me a bit that others weren't open about it, especially if they were asking me those same questions.

I can't say my experience speaks for everyone else, but I can't imagine why it'd ever be an issue disclosing these things openly.