Why bother posting when you don't want it? Pleasing one crowd only arises another with even more complaints.
I, personally, am against this idea. Think about it.... Planes can move out of range of a GV VERY easily. So they don't need to be warned of the Wirbelwinds on the ground. However, for a GV to get away from a plane, it would have to hide underneath some trees. And since the ground vehicles can't maneuver as easily nor travel as fast as a plane they require more time to hide or get away. In my opinion the icon system right now is just fine.