Lazs, I've also been bugging Pyro for this feature in the SEA for the special events. Our concern about GV's is slightly different, though.
We can envision an event where we'd have a joint GV/NOE aricraft attack against some installation. And while we can make the aircraft invisible to radar dots or sector counters under a certain altitude(say 300 ft.), the current tools we have right now would also make any GV's under 300ft invisible. Doesn't seem logical that a GV standing next to a target shelling the hell out of it would be invisible.
Pyro said that they are working on incorporating some change in this area, but he didn't say whether it would be in the next release or not.