Nothing in my nearly two years of using SO has given me the impression that SO seeks to monopolise the Q&A forum world to the extent that questions asked here may not be asked elsewhere.
I have posted a few questions here for which I have received no replies in the time that it normally takes to get a reply. They all deal with ASP.NET Dynamic Data, which in my experience is not a very well known or popular subject on SO. So, I went and asked them on Microsoft's ASP.NET forums, in the Dynamic Data section.
It has taken user XIII less time than it took me to duplicate them, to mark them all as duplicates on both SO and the ASP.NET forum. I find this behaviour akin to policing both forums for the wrong reasons, and would like to know whether I am allowed to repeat questions in forums unrelated to Stack Exchange or not, and if not, why not?