I still think we need some minimal security flights. No screening, no scanning, and no profiling. Flight crews will be heavily armed and personal weapons are allowed as carry on luggage.
I suspect that would actually be quite popular.
The Fruit-of-the-Loom guy would have successfully blown up that plane regardless of all that if he had got the mixture and/or detonating procedure right. The passenger that jumped on him did it after the fact of the fizzled detonation.