Outing Someone Is Never Cool

Even if that someone is a celebrity who's sexuality has been the source of gossip for years it's still not cool:

[...] singer/DJ Syd the Kid [of Odd Future], in an interview for L.A. Weekly, spoke about the sexual orientation of some of very big pop stars — like she was Wendy Williams or something — as though they were foregone conclusions rather than speculation. But let's be real: She just said what we're all thinking anyway. (source)

I may be in the minority here, but I can't think of an instance where outing someone is okay, except maybe in the case of a lawmaker who supports homophobic legislation, but outing celebrities just because you think they need to be outed smacks of ownership of someone else's sexuality.