I hope I put this in the right category. Please let me know if I did not.
A bunch of teenagers committed suicide because of bullying. They were bullied because of their sexual orientation. While I do not think they should be made martyrs, or given a "prevent suicide day" aside from TWLOHA, I do think that the matter of bullying someone because of their orientation is one that needs to be addressed.
Someone's sexual orientation does not matter. The only time it should come up in conversation is when you want to have sex with that person--and really that conversation ought to be between you and the one you want to have sex with. I don't use someone's sexuality as a descriptive term when talking about them. I don't feel like it's anyone's business what they do with their genitals. If they want to make that public, then let them. It isn't YOUR place to say it for them.
"Oh my friend Joe* was doing such and such and we went to Cook Out and--"
"Sorry, I haven't met Joe. Who is he?"
"OH. JOE IS GAY."
No. That is not how you describe someone. I don't care if you're LGBT or not, if you do that then you are part of the problem. Joe is Joe, it doesn't matter who he has sex with. Would you say that if he was straight? No, you wouldn't. So don't do it just because he isn't.
*Joe is just a random name, not an actual person.
I don't care if you like boys, girls, both, or neither. I don't care if you're FTM or MTF. To me, you're just another person.
TL;DR? WE ARE ALL PEOPLE. SEXUALITY DOES NOT MATTER.