I think the best thing you said on your site tabberone is about how it would be if a car company could restrict where you can drive the car you buy from them. that just hits home how silly all this supposed restriction on the end product really is.
Just because the companies' try to stop someone from selling items made from "licensed" fabrics does not make it legal, but do you have the money to pay an attorney to go against them anyway? So while it may technically be legal to make items from "licensed" fabric, until everyone gets that memo and stops trying to sue people that make items from their fabrics, I would tread carefully.
Rachel