If its hazardous for the end user, think about the poor guy (like I used to be) in the service centers, tearing down and cleaning up those same printers.
I'd go home at night with a black ring-around-the-collar and blowing black stuff out of my nose. It's a miracle I don't have black lunge disease.
Many people in the service businesses are exposed to hazardous materials every day and no one makes Headlines out of it.
Be safe.....don't breath.
Shadow
. Printer toner does smell absolutely foul though 
General