Answer by Paul S. R. Chisholm:
has it right. To which I can add a couple of examples.
- Mark Jen joined Google in January 2005. He immediately started blogging about the experience, and included "some information from prior postings that Google considered to be sensitive information about the company's finances and products" (source). Mr. Jen was fired from Google eleven days later. An interview the following month said, "Even now, weeks after he was terminated, Jen doesn't know what led Google management to decide to fire him …" (I can't find details of the blog posts, but I remember reading them and thinking, "How could he have ever thought this was okay to make public?")
- Steve Yegge wrote a long screed in 2011, accidentally posted publicly, that in part said, "The Google+ platform is a pathetic afterthought." Despite its overwhelmingly negative tone, this post revealed no confidential information. Mr. Yegge was not fired.
EDIT: Mr. Jen's first name is Mark, not Brian. Thanks to John Edwards
for the correction.
What must Googlers not talk about publicly to avoid losing their jobs?