Exactly, they might go off. If they thought we were really carrying bombs, we and our belongings would have to pass through some kind of bomb proof chamber etc.
The Israelis do that with their process.
http://www.thestar.com/iphone/news/world/article/744199-—israelification-high-security-little-bother

Pictured above is an excellent alternative to the TSA Pat Downs and Death by Xray at airports.
Outside every airport terminal, place hundreds of new bomb/IED proof booths. There is even a unit to accommodate people in wheel chairs.
All outgoing passengers must enter one of these booths. If they are carrying an explosive, the booths will detonate the explosives after the terrorists enters the booth and the doors slam shut.
This will eliminate any bs about profiling as everyone with a ticket will have to pass. Islamofascist women can leave their Burkas on with no problem.
After each terrorist is sent to hell, an automatic washdown and wet/dry vacuuming is done to ready the booth for the next passenger. Use TSA agents to insure the booth is clean for the next Jihadists.
Female terrorists can remain in their Burkas until the divine moment, and Islamofascist terrorists will not have to run crying to CAIR and our AG to complain about profiling and racism.