Jan, I don't recall what the letters stood for, but it was a support group for JWs who were only in because they feared shunning. If I have the details correct, Evans began sending invites to the group, which would show up in a person's Facebook activity feed, effectively outing them. When the problem was brought up, Evans seemed more annoyed that he was being admonished and less concerned about the lives he had just disrupted.
As for when I realized he was bad, that would be around the time of his livestream confession video. I had watched many of his shorter videos from time-to-time and knew nothing about him. I did know about this forum, though I had not signed up. So when I learned that there was some kind of scandal around him, I figured I might find more info here. And I found a lot more than I expected!