I didn't even realize it happening, but that's exactly what my LinkedIn feed has become, complete with memes and motivational JPGs.

What you found on Facebook at Work at Facebook were mostly very thoughtful product and engineering discussions: data-based arguments and clear articulation of company decisions.

You need higher-ups to start the trend, and answer tough questions candidly, but once that is the case, people with things to say will put forward similarly clear and pointed arguments.