OK so if someone takes one of your decals and adds freckles then releases it as a new add-on, you'd just be like "oh, whatever!" ?
You've got a point.
However, you can't keep people from editing addons. Even if you make it impossible for anybody but the creator to read, somebody will eventually be able to "decipher" it, just like Kalphiter did with the mining mod after Red_Guy made his edit.
Jaydee made an edit to it as well, I'm currently the other person who has Jaydee's edit. It's got private spawn points that can be bought, and will end up with more "buildings" that can be used, such as refineries. Sure, he's editing the code, but he's adding something.