My experience (as an engineer) is the same. It's actually surprising to me that anyone doesn't work under those restrictions. I assumed this was part of the 'default' employee agreement that all businesses demand: don't disclose competition-sensitive information; don't talk to the press without authorization; don't reveal your company affiliation when using social media, but if you do, explicitly indicate your statements are not official company communication. People do get in trouble for stepping out of line. It's actually a really, really, big deal for the company if someone (intentionally or unintentionally) creates a public relations issue or interferes with advertising, let alone reveals technical/project information that could be used by competitors.
I guess not all employment fields work that way.
Also, having to report contacts has long been policy for people working in defense, and technically includes over-curious people at bars as well as journalists. (Discretion is allowed).
Disclosure: My work experience is at large defense and large non-defense companies. So I may be inured to big-business bureaucratic restrictions that others might find novel or frustrating.