I think it's interesting to note that not only is there precedent for this type of "blocking technology that prevents the printing of certain things"[1], but it's also inconsequential and uncontroversial enough that most of the people here obviously have never even heard of it.

We lost the ability to print $50 bills with our HPs[2] and it had no noticeable negative impact on society. I'm not sure why losing the ability to print a gun with our Prusas will be any different.

[1] - https://www.scienceabc.com/eyeopeners/cant-photocopy-scan-cu...

[2] - https://h30434.www3.hp.com/t5/Printers-Archive-Read-Only/Won...