I wonder what's with safety of such enclosures made of pcbs? For instance is it going to have unpleasant chemicals transferring on the fingers and then to the body when someone touches eyes or mouth?
All of our products meet the REACH and RoHS requiements for restricted and hazardous materials.
TL;DR It's fine.
Use of PCB as a human user interface started in hobbyist world, because it was cheap and easy to create sturdy front panels and was good enough for creating prototypes, but it was never meant for mainstream commercial use in this way - as PCBs even if they meet RoHS, still can contain dangerous chemicals - like flame retardants.