Ford engineered a safe way for that disc to adhere to shell-housing; I am sure its been heat, pressure, velocity tested.
Look for crashed GTs on wrecked exotics with airbag housing off, the disc is still on.
An airbag inflates in miliseconds and anything not anchored will continue to launch.
I doubt the surface remains flat in inflation, and any adhesive surface will deform and release anything on it.
Some guy on ebay who says "install at your own risk", is not an R&D Dept....nor a deep pocket to repair your head.