it is possible to extract items which are embedded in any titlepack, which is kinda not fair.
You can simply enter meshmodeller and click on import, it pops a window with all items you have local (documents/items/).
Problem is, you can also see all items which are in the titlepack embedded, even those which are marked as internal
here some proofs


Everyone can "steal" titlepack data, you can not avoid that at all. Hide atleast the internal items please (items which are in the tp but dont appear in editor for given reason - "hidden")