This is like saying "I can take this guys rented car and use it for another week, because it's the car company's, not his." Even stealing somebody's build, idea and events is legally acceptable, Rocketttdog isn't trying to sue him. However "legal" it might be, it isn't socially acceptable to steal or "use" somebody's build and claim it as yours, and face it, 99% of drama topics are about people who have done something socially wrong. He hosted his build for other people to enjoy and play in, not "use". As a URPB leader, I can take any clan-related action I choose to because I protect the "borrowed property" of my members. I am not trying to intimidate him, I just do not want him in my clan. Ever. To be completely honest, I don't care if you think my clan is noob, there are over 16 people who think it isn't, plus more who have not joined. As for my server, I host RPGs occasionally, and I do not want anyone "using" my RPG, however legal it is.
Badspot could claim any addon as his own, true, but he doesn't because he respects the members of his game and because he would likely be one addon-maker short.
It only shows that Konami is an incapable and jealous person.