[nmh]

"It's not entirely accurate that Mormons believe being a homosexual is a sin. More accurately, Mormons believe homosexual activity, like any sex outside of marriage, is a sin. Homosexual behavior is considered as much of a sin as premarital heterosexual behavior."

Sou would a gay marriage end the problem?

BTW, WHY wouldn't homosexual activities be a sin for a Mormon? Don't they use the Bible as their litmus test?

[libsl]

I don't understand your question. Mormons do consider homosexual activity, like any sexual activity outside of marriage, a sin. I think a major scripture that is pointed to says something about "adultery or anything like unto it."
Regarding whether marriage would solve the problem, Mormons don't recognize same sex marriage so I don't expect that to happen.