Regardless of peoples' individual opinions on vaguer subjects, there are some basic principles behind the raw, palaeolithic diet concept. For example the words "raw" and "palaeo" imply, by definition, that this is not a pro-cooked or pro-grains/pro-dairy board, in an overall sense. Actually we do have specific forums for raw dairy(the Primal Diet, grains and raw dairy(the Weston-Price Diet forum) and even cooked food and raw veganism can be discussed in the hot topics forum, and that's where they should be confined.
Now, of course, we could allow free discussion of everything on all forums, in which case, we'd quickly end up with people writing in stating, for example, that they would much rather eat a junk-food diet, and asking members if they think a Burger King burger is healthier than a McDonald's burger or how many calories there are in a Haagen Dasz ice-cream pack, and other similiar rubbish. (I've actually occasionally had a number of questions very similiar to the above being asked by questioners on another raw-meat-related site, although I at least had the option of refusing to answer such moronic questions). Plus, newbies who come to the rawpaleoforum website are mostly not going to be interested in topics on cooked diets, or dairy etc., they come to this forum precisely because this forum offers a wholly different approach to that offered by those other diets they've previously tried and failed with. As soon as we clutter the forums with nonsense about pemmican or the supposed "benefits" of cooked foods etc., we will simply discourage such potential members from joining- after all, they can quite easily read about similiar pro-cooked rubbish etc. on other forums.
Another aspect:- most of the forums I know of which allow any and all discussion and which don't have a focal point on which most members agree, tend to end up with very few people posting(because no one cares about anything in particular, or because people are too polite to each other to want to cause controversy, so fewer posts get generated).