There are respected theologians, such as Lewis Sperry Chafer or C. C. Ryrie, who have argued so strongly in favour of a perverted view of "eternal security" that they have said a saved Christian could fall away entirely from the faith (and become an atheist, amongst other things) and yet still have assurance of eternal life.
So as stupid as the spoof question in the OP is, there are still people - who are not stupid, and should really know better - who would answer yes.