The problem is not you might pack a bomb, but something that triggers the TSA agent into thinking about bombs. They're sensitive like teachers looking at a five year old kid who chewed his poptart into a gun and is pew-pew-ing at his peers.

The TSA use to have a trophies page of crap they confiscated because it spooked a TSA agent, and that did not include the things they confiscated because some TSA agent thought he might like a used iPad (or something). It also didn't include any actual bombs.

In fact, the only bombs they ever caught were those planted by the hired pen-testers (and they totally failed to catch most of them).