I understand this is a Mac and PC games forum here on MacRumors but I would guess the intent was probably just to open discussion to playing Windows titles on Macs. At some point however it becomes conversations about playing Windows titles on PCs, PC hardware specs, comparisons of PC hardware (said to be superior), comparisons of games running in one OS vs the other (where OS X is typically knocked and Windows praised), negativity about playing in OS X, even with native games, etc. Suggestions to own a second computer, a PC, to play games on and more.
Really, that's the stuff I take some issue with and is what causes me to wish the Windows stuff had its own forum. Even if it did though, I would still feel discussions pertaining to playing on bootcamp or with Parallels are fine as they are Mac centric completely. Those conversations are about Mac gaming options. In the same way, playing games with Boxer or Wineskin are Mac-oriented subjects.
Any discussions about gaming on PCs or PC hardware are no more relevant to this forum than are discussions about Xboxes and Playstations in my view.