I think understand the logic of the Adm. in this topic, if you are the owner of a forum who have a section that allow the sale/trade of figures and other things, another section of Interest and latter if successful in the amount of people willing to get onboard and pay the cost of a limited production run of particular characters, outfits,weapons,headsculpts wich already have trademarks...usually international cover since these movies are for most part shown in most world markets, so in reality...the copyright cover not only the story plot, character names...but also the likeness of the actor,wardrobe and other props....movie studios have to even ask permision to weapon makers to use their weapons/designs and give them the credit if that the case (sometimes manufacturers pay for the weapons or props bearing their names to be featured in the production)...in other words...every single thing you see in a movie, drama play, concert, video game, tv soap opera, tv show...have a primary and secondary copyrights to all that is shown...even more when is a very particular field like Sci-Fi properties.
If I make a custom figure...even a "close resemblance" to a copyright character/prop...and...make....ONLY ONE...but sell it and have a profit by it, am breaking the law, in some jurisdictions the law is more extense and unforgiving than in others..but in the end...they protect the original/current property/copyright owner from all angles. It do not have to be mass produced...that is a loose term...you can do 3...and believe me it has happen...it can be called "mass produced"...may sound nuts...but it is how it works because you did the first and two more with profit on mind...if you keep all tree for your own personal collection and pleasure...no "problem"...if you have a profit...problem.
The House of the Mouse have one of the most extensive, detailed, and pure and simple devastating branch of copyright investigators and lawyers that you can imagine, they police their brand(s) like very few in this world and are direct and to a point to remove any violators of ANY of their 1000's of copyrights. This same things happen in the scale model car world and in particular the "prancing horse" company who made a crackdown on anyone making ANY of their cars or using any of their symbols, at one point...only ONE model company could produce models from this company.
And even if you dont sell or allow the selling of these unlicence items in this or any other forum/media...but still discuss them, show photos of them, alterations base on them...in the eyes of lawyers...you are making aware the public of the availability of that product, possibilitys of different price range and the possible desire of those interest in that subject to aquire that one...instead of the original copyright version, again some may argue about the freedom of choice, speach and other constitutional rights, but lets not forget...those same rights cover those who paid to have their creations secured by the law and protect their investment and of course...revenue...it happens in ALL field, sports,motorsports,antiques,memorabilia,etc,etc.
Sorry for my english grammar, not the best...but think is better than a web translator!!