http://www.genebenson.com/docs/icing...n_april_07.pdf
The whole icing thing is nagging me and I spent hours researching it. Yeah.... Im still a nerd.
If you read the article above, the last paragraph that starts with "Ultimately......." sums up the FAA clarification letter to AOPA. Although it doesn't clarify anything.
I believe (according to the FAA) you can still fly into visible moisture at freezing and still be legal, so long as nothing goes wrong, and a prudent pilot doesnt reasonably assume that ice will stick to the wing...(airmets,sigmets,composite information).
I dont know how someone decides if ice will stick to a wing or not (composite information per the FAA) LOL
So my personal choice is to stay clear clouds, rain, and freezing rain with temps below freezing.
My only question/comment is again regards to snow. It is visible moisture. However, I could argue that based on weather theory that a prudent pilot could not reasonably assume (after checking the TAFS and FA that only snow showers were forecast or observed....no mixed rain/snow) that flight into a snow shower would cause icing.
So if theres good VFR with just scattered light snow showers, i am flying. HA Stupid FAA Jerks