Life's a bitch... and then you resign.

Bluefield State College's Board Chair resigned after observing that a staffer's presentation would be "a bitch session," and then hitting "reply all"... thus sending his comment to that very staffer.
http://www.wvgazette.com/article/20150430/GZ01/150439931

Don't you just hate when that happens?  Worse still in my opinion is Google Mail, which my institution switched to recently.  Gmail likes to be "helpful."  

One way is that it bundles emails bearing the same topic reference.  And since you can't usually see all the emails in a string, without opening the whole string, you might send off a message to one recipient, unaware that other emails have been bundled into the batch... including emails sent to an entirely different person or persons.

The solution is to slow down and proceed with deliberation... you know, as in the olden days when we dictated a memo, waited for our secretary to type it, then proofread it and mark it up, and wait again for the final version on official university stationery.