1 - We settled that concern. As long as we upload very low-poly meshes, they’ll be 3D printing garbage.
2 - Pirates have different motives. What you’re asking is impossible to know. As long as 3D files are open to export, they’ll continue to be exploited in a number of 3D selling websites and impersonate as the original artist. Hopefully FAB will solve that issue that’s been on for years.
3 - Again, theoretical question. Pirates are everywhere and they only want free stuff or spend the minimum. It’s one of reasons I often raise the price of my assets. If you can’t stop them, at least hurt them in the wallet.
4 - Yeah, we talked about that. Apple does a pretty good job with its Apps (sandboxing). People can use them but they can’t download its contents (3D files, source code, etc). The server solution is an alternative but still, not perfect. I think the guys in Epic can come up with a smart solution.
5 - I can only give you my opinion: I do think it is worth for them… because then they’ll pass as the original artist and upload it in every 3D asset marketplace in the Internet. Those Marketplaces have no way to check nor interest to know who the true creator is. They just want sales.