I don't think so - I can export my data, then delete it from your network. Now I'm in control of its spread. Subsequently, I can import that data $elsewhere, ad

I don't think so - I can export my data, then delete it from your network. Now I'm in control of its spread. Subsequently, I can import that data $elsewhere, add to it, export again, and delete it from $elsewhere. I don't see these as being in opposition at all.