Well Sherder, I'm not sure what this has to do with Street Fighter X Tekken or Dan, but here goes:
Yes, David Yost (Billy) is gay. And yes, he was teased at best and harrassed at worst by many members of the crew and production staff. His castmembers, however, did NOT participate in this. Even though Austin and Jason were known to pick on him, it wasn't mean-spirited and it certainly wasn't because of his orientation. Just teenage guys being teenage guys. Also, David was older than them and thus a bit more serious about his work and well, you know...boys will be boys.
You're right, he'd shouldn't have been harrassed and it's sad that he had to endure that. I've met and talked with David and he's a really kind, quiet guy--not deserving of the treatment he received.
If you haven't already, please watch No Pink Spandex's interview with him that came out in August of 2010--you can hear all about it in David's own words.
