Earlier quoted context omitted.
Surely this is something trivial to identify internally for you guys?
We're pretty good at dissecting various techniques, spam networks, etc. But I always like to hear feedback from different places to see how we're doing, uncover new pockets of spam, etc.
Always come up, they offer little value, and are often no more than a few months old, and all made for adsense pages of content ripped from other places. Moment you take one down like you did with hdwallpaperarena.com they just redirected it to hdwallpapersinn.com (which even has the same logo up still).
I just found it a bit of an an odd one given some tactics they apply are outlawed yet they seem to get by, I always see these sites crop up.