We had an unusual situation happen here in California last month. At a Stonewall Democratic Club meeting, one of the candidates was a legislator who was seeking re-election. His endorsement was pulled for debate (all of the other recommendations were then approved) and during the debate on this one person, a woman who knows him well, who is a long time Democratic Party activist and active in her teacher's union, got to the microphone and said "You have to endorse him - he's gay".
He is gay, and most of the members of the club knew it - but this was different in that it was publically spoken during a meeting (and subsequently reported in the news). But unlike some of the other known examples of "outing" - the woman doing it wasn't malicious, she wasn't trying to pry into his private life - she was just arguing and wondering why the club was even debating his endorsement instead of just automatically giving it to him and said what probably many in the room were thinking.
Of course, this happened a few weeks after the republican legislator was caught DWI, having left a gay bar with a man - and that was in the paper as well.
Do intent matter? Does exposing hypocrisy matter? And is it outing if someone thought everyone else already knew ("Oh - you'll never get anywhere with him - he's gay")?