What did you expect, that you'd host that awesome build of yours and no one would save it? This is why we need some system to regulate who can save bricks and who can't. The funny part is that it seems like it would be easy to make. Just like how our trust system regulates who can build on/paint/destroy our bricks and who can't, we need an additional trust that makes it so people can't save bricks from a person with a different ID than theirs without having that person's Save Trust (as I call it). I'm sorry that this happened to you, but it's the way the world works. Noobs will be noobs.