What bothers me about that avatar is not that they are emo OR that they are two boys making out, but the fact that they probably aren't actually gay or even bi and are only doing it for the attention - hence why they let someone take a picture of them in the first place. I'm willing to bet neither of them would ever date another guy in their lives. Accepting the homosexual lifestyle doesn't mean treating it like some kind of crazy spectacle where people can point and gawk and go "LOOK GUYS, REAL LIFE GAY PEOPLE, AREN'T THEY ADORABLE." It means that they like people of the same gender as them and it's who they want to be and that's it. People who are really and truly gay are not doing it for the attention and they most likely are not doing it for you, either.
And now I guess you can kick my ass for not having a sense of humour or something.