It seems this back scatch ring has been around for a long time, and to be honest I'm surprised it's lasted this long. I'm also surprised to see quite a few familiar names on it.
Ok, the landscape may have been different a couple years ago, and users were all starting off, eager to build up their account using whatever means available. But we've moved on since. We're a much better and more mature platform and community. What was acceptable two years ago isn't anymore. These 400+ people on the trail need a reminder they're still on it, and it's not ok nowadays.
However, I find it hard to believe they don't know they're circle jerking. Maybe just playing ignorant? Afterall, why stop abusing when no one is complaining? Integrity probably is worth nothing in their eyes.