Down Low Dudes in Atlanta?

I’m planning to do a post on both down low and barely hetero dudes in the near future, but meantime I saw a post on another site asking why they’re so many down-low guys in the ATHELL. I thought the point of the DL is that nobody would know. How can it be downlow, if people know? And how would you know unless you’re sleeping with them? Hey, I’m just asking.