The trouble with guys like you is that you start shooting from the hip just because it sounds too far for your brains to comprehend. Don't bang your head just yet. Read on.
Like the F-22 are you aware that even Northrop's older B2 stealth bomber has an anti grav/electro-gravitic propulsion system. Have a look at this page from Michael Schratt's book...
Much of the craft's hull is made up of an advanced dielectric ceramic material. It also uses the Biefeld-Brown effect to ionize the air over the craft that probably reduces energy emissions/signature which cannot be picked up by BVR detectors, and so the extremely small or almost null RCS .
Now if you're interested in knowing more about research in gravity shielding (anti gravity) let me know instead of bashing technology that seems science fiction to your uninitiated brain!
Cheers!