Remember to conduct yourself internally assuming you will have a public audience. Because someday you might.
Was recently discussing a legal retention requirement in company chat. Made sure to be completely forthright and formal about responsibilities. Can’t play with that stuff.
Remember the LIBOR scandal that nearly brought down several massive banks pivoted around some chats were they joked about “bolly” (Bollinger champagne).
That was fun to read in the news. Their chats were barely grammatical and had little to no punctuation, but they were responsible for billions!