I technically answered #4 (depends on the situation), but I believe by and large LGBTs have it worse. If nothing else, an atheist can usually hide themselves better if they need to. In almost any situation an atheist can still function without having to give anything away about their beliefs, but LGBT people have to limit a lot more if they want to remain hidden. For example, someone in a same-sex relationship can't just go out on a date if they are trying to hide their orientation unless they pretend they're just friends or hope no one they know sees them.
On the flip side of the coin, it seems nation-wide, gays are seen are more acceptable than atheists to your average American (I'm not sure where the transgendered fit into this). There was a study a few years back that showed atheists are the least-trusted group in the US.
On the flip side of the coin, it seems nation-wide, gays are seen are more acceptable than atheists to your average American (I'm not sure where the transgendered fit into this). There was a study a few years back that showed atheists are the least-trusted group in the US.