Right now the GV's already stand out like a sore thumb (little black dot in a see of green dots), not to mention if you click on ground view while you are in a plane.
It would be cool graphically, but would be like the wake behind pt boats. Basically a giant sign saying "here I am come kill me".
If you make so GV's have increased air visibility when on the move, It only seems fair that they should be in ratio equally hidden from planes views when stationary.
Someone brought up the idea that you could add to tanks an option to deploy camoflauge, and have 1 or 2 sets you get when you up in tank. So when you find a good hiding spot you could deploy camo to hide your tanks position. That would be a good trade if it was elected to enhance dust trails.
JMFJ