A guy I taught to fly helicopters died while flying his King Air after listening to the weather advice of ATC. Draw your own conclusions...
From the NTSB report:
"The pilot's failure to avoid severe weather, and the air traffic controller's failure to provide adverse weather avoidance assistance, as required by Federal Aviation Administration directives, both of which led to the airplane's encounter with a severe thunderstorm and the subsequent loss of control and inflight breakup of the airplane."