I know a number of people who 'hack' religion, in the sense that they don't necessarily buy into all of it, but use it to further an agenda that I would consider good. My former pastor (and father) is one of them. I've also known a number of gay individuals who did not believe they were 'sinful' and yet actively worked within a religious framework that condemned them, because they felt the benefits were worth it.

That said, most of them do believe quit a bit of their chosen religion.