Hoho, let's just say you make a mod. It's, I dunno, a mod that adds pickaxe upgrades. These work on all pickaxes. They require iron to upgrade any kind of pick, wood or diamond. Greg comes around and makes pickaxes require plates. Okay, kind of annoying, but okay, you can live with it. Then, he takes your code, and makes it so that if GregTech is installed, all of the upgrades also require plates. Why? Because he is the big boss with the master code.
This is what Greg has been doing since, oh I dunno, since GregTech has existed. Granted, I like what the mod adds, not what it subtracts from the game. If I personally (and I am working on a mod with some other people) made a mod, I wouldn't want other modders dicking around with my code so that it is "more balanced". No. It's my mod. I can do what I want with it. Make your own mod, which you did, and you also ruined my mod with it.