It doesn't matter if a mod looks the same visually. Unless the code is identical in it's structure, it's not stolen. The idea can be duplicated with ease if you're a programmer, but that doesn't necessarily imply theft...

First of all, you are right all the way except for the skin stealer video on youtube. The code comes from me, I did the same texture pack installer a while with the same options. He got my code because when I got in his team he said he wanted to know how good I was in vb.net. I did this program in 10 minutes, and the gui took me most of the time. Then I left the team and I had realised he had stolen MY code. I learned from a youtube vid, and after I innovated. I found out new features and everyone copied it. And he cant put a copyright, he only wrote copyright, it dsnt mean it is. And even if he used Myows to copyright, he would need to put Copyright Myows, because the copyright is not assigned to him. And anyway, .NET framework is open-source, everyone can decompile it.