I honestly don't see the problem with (1), this is already the case when it comes to paper printers and what you are allowed to produce with with your hammer an

I honestly don't see the problem with (1), this is already the case when it comes to paper printers and what you are allowed to produce with with your hammer and anvil anyway. I'd actually be surprised if there aren't plenty of countries having legislation in-place that will cover exactly this, whether you use a 3D-printer or not is simply not an issue.