Why is this a surprise? They treat their staff at all levels notoriously poorly. If your workers have no emotional investment in your company you shouldn't be shocked when they start doing subversive things.
This was covered a few weeks ago: <a href="https://news.ycombinator.com/item?id=17999282" rel="nofollow">https://news.ycombinator.com/item?id=17999282</a>