Jamais Cascio points us to a short story by Sven Johnson about 3D spam, circa 2019, posted at Futurismic:
I can remember the first “fab spam” outbreak like it was yesterday.
Ever walk through a field and come out on the other end with burrs clinging to your clothes? Well, imagine something like those little burrs spilling out of your home fabber. Embedding themselves in the shag carpet. Attaching to an angry cat. Perforating your foot.
If you bothered to look closely, you might even have seen the maker’s mark … right beneath the words “Firewall Protection Software” or “Network Security Services”.
Read it -- it's short and fun.