Why would they do that? They don't have any reason. Quinn and Tommy are working together at that point to move the HOTs partying from the Alphas to the DIK mansion, why would they want to fight with the Alphas, the Alphas already disrupt the party after the cumpetition before the letters are sent because the HOTs are there, they don't need to make it worse. Tommy may be a bit of an asshole but he loves his brothers and Rusty is his best friend. Tommy also gets beaten because he fucked Arieth, does he want his brothers to be beaten too by exposing them? I don't think so. And they don't seem to have problems with Chad or with people being gay. So no, I mean DPC can go that route but it would make little to no sense.The only ones that we are sure would be Quinn and Tommy, and while both would do it, they would not hide that Chad is gay.
I don't understand Vinny's involvement because he wants the drug business, why is Quinn's drug trade going public because someone is leaking pictures of Cathy and sending letters to the Alphas?. I don't see any cause-effect. But Vinny doesnt need that, he has a bad history with the DIKs.