I don't get it. You spend tons of time designing a product, give away the plans for free, don't bother to copyright or patent it, and then whinge when others commercialize it.
Its the companies that patent other peoples works that are wrong. To keep the hobby and community open is not impossible but when some vendors decide to patent/copyright "their" work it hurts everyone. But since some vendor does I have to say that it may force the rest to follow. So I would suggest to actually patent/copyright the work, now I don't know how much it costs in the US, but it is quite expensive in Sweden so I don't know if this is even a realistic thought.
Perhaps several hobbyists and small size vendors can go together and use each other copyrights and prevent any other vendors from stealing designs.
I'm opposed all kinds of patent and copyright as I find that it prohibits smaller companies to grow, but you can't sadly only live on pricipal.
the copyright law in US is VERY easy to take advantage of and misuse. People even successfully trade mark common words (though mostly they get denied, but they do slip through), which is crazy in itself...EA (electronic arts) is currently trying to copyright the word "Ghosts", its stupid. Probably get denied, but they are a huge gaming company so who knows lol.
But its sad that people just steal designs and copyright them, even if they didn't actually come up with it. It doesn't help the ant hobby at all, which is still small compared to other hobbies. But, stealing things is the way of the present times and copyrighting stupid stuff that shouldn't be copyrighted at all, or even be attempted to try to copyright.