Info for moderators

@explorerleslie , @cahrens , @gwprice , @srpearce , please take a look! HTML version here: http://draft-cohorts.readthedocs.org/en/latest/cohorts/cohorts_discussions.html
The first time I read this, I didn't realize the sentence meant that in this case, the user made a mistake. Maybe add the word "unintentionally" in there somewhere? "It also means that it is possible for you to share information unintentionally with a different audience than you intended."