Don't be too scared of Asbestos!
Airborne asbestos fibres can damage your lungs, I agree. However the whole asbestos thing has been overblown as far as the health and safety thing goes. Prolonged exposure to any airborne particles (asbestos, MDF, tobacco smoke, cement, straw etc) is harmful to your lungs and best avoided.
I suggest you DONT stick a straw up your nose and suck up the powder! Use a vacuum instead. If you get some on your finger don't panic, it won't kill you!