You need more proof than a picture on a website to discharge someone from the military. They might try to get you for adultery but to outprocess you for homosexuality? In over a decade in the service I never saw a single case of that type of discharge and I knew about 10 openly gay service members, another 10 that were OBVIOUSLY gay, and an bunch that did have pictures on sites and either just got gossiped about or warned to be more discrete.
Not saying this is how it is across the board, but in my experience.
Bookmarks