There's a post on HN about someone being banned from Facebook because they violated (supposedly; who knows what violated even means) Whatsapp TOS from 3 years prior (possibly even before FB acquisition)

Someone needs to tell Zuckerberg about this thing called "antitrust" and not being a dick and that you can't run your company(ies????) like this https://news.ycombinator.com/item?id=1692122