Printers print very small dots on the sheet of paper you print so it canbe identified. https://en.wikipedia.org/wiki/Machine_Identification_Code

No! I will not do what the (Bottom Text Here) says!!!

I feel the same pains with Signal, I was very lucky in the sense that basically everyone I needed to communicate with would join, however a few members, mostly my brother which is known to be very much a stick in the mud wouldn’t join. While I love him to death, he can be very much a pain to bargain with. Maybe someday…