I work in a heavily regulated industry, and 'yes' is the answer for us, even going as far as mobile-first IM platforms. There's a very small number of vendors who pull in lots of money making UI hooks for things like WeChat and WhatsApp just so we can store the messages for the people in Risk and Compliance.
I can’t remember what the case was but I recently read an article where somebody was joking about a company doing something illegal and the response from the legal department in Slack was “ha ha shut up”
During your Company Ethics training (when you learn about insider training and not bribing government officials) they also tell you "never comment on the legality of something unless you're a lawyer. But if you do, say it in a meeting and not digitally."
