One real scare in serious icing conditions and you will be solidly in UM's Fan Club!
I pair the classic Fog and Icing as being two of the Rules I obey blindly.
Temp and Dew Point within 2-3 Degrees, nil to light wind, any kind of condensation nuclei....Tea Time.
Forecast or Actual Icing Conditions forecast.....VFR flight only and upon encountering icing....Tea Time.
I once used Radar to find the Columbia River Gorge as we were headed down at full power and Vy Airspeed.....fortunately the weather improved and we broke out of cloud below the tops of the ridges.
If you encounter Freezing Rain.....there is warmer air above you. How high is the 64 Dollar question.