I am 100% sure you do this in ANY businesses in East Asia (small medium or big), you get the boot too. I know cases in Japan and South Korea doing this kind of stunts even if just posting to intetnal forums get one fired. China depends, they are more sensitive to anything related to government matters or potential customers lost.

I don't think this is exclusive to American workplaces, I would wager this is the norm in most of the world.