From the rules and policies page:
The Service may provide, or third parties may provide, links to other World Wide Web sites or resources. Because AVS FORUM has no control over such sites and resources, you acknowledge and agree that AVS FORUM is not responsible for the availability of such external sites or resources, and does not endorse and is not responsible or liable for any Content, advertising, products, or other materials on or available from such sites or resources. You further acknowledge and agree that AVS FORUM shall not be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with use of or reliance on any such Content, goods or services available on or through any such site or resource.
The fact that AVSForum states that they are not resposible for the content of outside links tells me that they DO allow outside links.
If I want, I will join and participate in other outside forums, with or without your permission. I am amazed at you audacity.