You can worry about it or not -that's your choice, but please be careful when claiming something's food safe when it does not meet recognised standards for food safety. There's a world of difference between saying you're OK with how safe something is and implying it meets standards. Remember BPA? Loads of polycarbonate products used to be made using BPA, but it's been found to seep into food over time and may have adverse affects on your health, so it's being phased out. Can you guarantee that the filament you buy has no contaminants in it, picked up from the floor of a Chinese factory, that will seep into your sausages over time? I'm sure you find it an acceptable level of risk, but others may not.

Realistically, the actual danger factor from 3d printed items for food use is unknown, not low. Use at your own risk.