All ice is hazardous to airplanes. The characteristics of ice
provide a clue as to how rapidly the situation may become
uncontrollable, and how quickly the airframe may shed ice once you
leave ice-accumulating conditions.
Single Pilot Resource Management -- Cockpit resource
management (CRM) principles apply to the pilot-in-command (PIC) of
a personal jet or any other single pilot certified aircraft.
"I had been in that runway before. It was no problem
whatsoever."
Source: John Leonhardt, who was the passenger
in a Mooney M20E flown by South Carolina Lieutenant Governor Andre
Bauer when the plane crashed on takeoff near Blacksburg, SC in
May.