Board Thread:Mod Discussion/@comment-24489208-20131106230206/@comment-77.250.167.251-20140211181519

as quoted form the ESO devs :

Some ESO fans think that it will be possible to add their own items like armor or weapon using LUA but it’s misleading. Any addon for an MMO game is a tool with limited possibilities. It can modify UI or track, collect, analyze or show information. But it does not add new objects or items into the game itself. For example a Crafting add-on may display different advise for crafters or collect statistics about your crafting activity, but, it can’t add new types of ore or a new recipe into the game. You may only create programs that modify UI or collect, analyze and display different data.

Hope that made it clear