There is a tool called "McDecryptor" and a pirate bay clone called "The Pillager Bay". For cracking minecraft marketplace items (worlds/skins/resource packs)
When I google my game I see it come up on tons of piracy sites and I honestly don't care, it's like a badge of honour.
So I was actually reading up on this thing and it seems like it might actually be a problem. I know a lot of people don’t care about this thing because they’re not in the US BUT the Americans tend to make a lot of laws which roll over to other countries afterwards. This is another big step in a war against piracy.