I don't need to iterate on the greatness of them here but they have the potential to radically help teach people how to make stuff which drastically helps in industry.
My main concern with these articles is that there is no relative risk factor presented against. I have no idea if these particulates are something it would be worthy to invest in an enclosure or are there low levels which are permittable.
I know that I personally am much more likely to have health complications from almost anything else but to someone else reading the above article they may draw the conclusion that 3d could be dangerous and should be restricted. If a person shows up to a school board meeting throwing a fit that they are running 3d printers with children in the same room then it looks bad on the printers, possibly having them removed and to generalize I think that that is the last thing anyone wants.
Ninja edit: formating