...but it also doesn't necessarily mean they are.
It's not always about the fact that we're gay or lesbian, into bdsm, too fat or too thin, heterosexual, gender neutral, gender queer, two-spirit, transgendered, a cross-dresser, a person of color, etc., etc.
I know someone who is x. They are rude, angry, miserable and aggressive in their insistence that no one likes them because they are x. It is this person's firm belief - their absolute 100% insistence too - that no one wants to be with them, listen to them, act on whatever they want done, not because of them as a person but, rather, because they are x.
I think that there is often a fine-line we have to walk when we cry "foul" over behavior or media coverage (or lack thereof). Sometimes we're simply not a likable person. Sometimes our behavior makes us someone others might want to avoid. Sometimes someone doesn't want to be with us not because we're x, y or z but, rather, because they simply don't like us.