This subject came up with both of my boys while they were still in high school. My eldest had a friend who, when she came out to her parents about this, they were extremely hateful to her, and called her a few choice words. My son witnessed this awful thing happen to his friend, so he was wondering how his father and I would handle the same situation and asked us about it. At first, he didn't tell us this but asked us how we would feel if he said that he was gay. We both told him that it didn't matter to us whom he chooses to be involved with, because he is our son, and we would love and support him regardless of his decision. It was then he told us about his friend and her parents. It was so bad that the girl nearly committed suicide. There is NOTHING in this world that would ever cause me to turn my back on my own children, including this.
My parents, on the other hand, is a completely different story. My mother has the typical JW attitude about it, and my dad (not a JW) hates them with a passion, and I was raised up with this. My dad's sister actually went to prison for murdering a lesbian when she was younger, that is how extreme my dad's side of the family views this.