I saw this story today..
3D Printing Community to Crowdsource Saving a Species$1:
Project Shellter intends to leverage the Makerbot community's design talent and network of 5,000 3D printers to design and produce shells for hermit crabs who face a species threatening, man-made housing shortage.
I read the story, thinking this was a great thing.. Then I read the comments.
$1:
Why are plastic shotgun shells unacceptable, but not your plastic junk?
Oh, because this is a transparent attempt to sell more stock for your printers. It wouldnt bother me if the end result wasn't more plastic needlessly dumped into the worlds oceans.