At least many many years ago, it was just groups of people with a common interest finding each other. And then within those groups, you had people with a more l

At least many many years ago, it was just groups of people with a common interest finding each other. And then within those groups, you had people with a more loose moral compass, who ended up finding each other. Also, not that many black hat groups are publishing papers, and the days of full disclosure are long past us.