You reflect and revise and delete before you hit send.
Mingle2's Sex chat rooms are full of fun, sexy singles like you.
Once sent, no matter how assumedly disposable, emails live on.
(Just ask some of the Sony executives who realized their theoretically private comments were anything but.) That's why you take care.
That might not be so true where chat rooms like Slack, Hip Chat, Campfire are concerned. Conversations tend to be less professional and more off the cuff.
Chat rooms are like informal hallway gatherings: it's easy to talk, gossip, chatter...