boohoo. hes using your build without giving you credit. he doesnt need to and you gave up your rights to that build the moment you hosted it publicly. stop trying to dictate what builds people can use. i can do whatever i want with your build if i have a save of it and i wouldnt pay tribute to you just because you built it. the build is originally built by you, yes, but that doesn't mean you can tell people whether or not they can use it.
So if someone stole your space ships. posted them on forums, claimed all credit even took the time to scope out any traces of you in the build and replace them, you wouldn't be offended? if it's a build he took the time to build, i think he should have the right to protect it.