Just saying, I have friends who have created systems called mod rippers. They can extract all the files to any add-on from any server they enter. I've watched it in action. I hardly understand it though, so I'm no help in that respect, but that's why I tell hosts not to get too proud of their add-ons.
Luckily the three of my friends that have rippers don't release them publicly, they keep it to themselves and they stay quiet about it.