Originally Posted by GUWonder
This may not be applicable to TSA-used x-ray machines, but a densely packed ball of rubberbands will be seen by some x-ray operators to look indistinguishable from a dense metallic solid on some x-rays. Same thing for a densely packed stack of magazines of certain paper stock.
How about using a HHMD to determine if there was a metallic object inside? Would that have been too difficult?