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Had a look at their API and it seemed at first glance pretty foolproof. I could very likely be mistaken, so any official clarification would always be nice! I wouldn't personally stress it too much, I doubt the occasional "hobby" type person is likely to have sidechained a network of 10+ printers to bulk download a single object. If I remember right it looks like they used encryption as well, so again, I wouldn't stress too much on it!
