Sad as it sounds, don't blame the worker ant security guy, he gets his ass busted for not following the "rules" , just as you as a pilot are expected to follow SOPs/ air law unless there is an exceptional circumstance.
As an Engineer, we have the same problems of being refused to carry through a bottle of water, but happily take gallons of hydraulic fluids, engine oils through etc
.. Justifying your tools is always good fun as well, and I have watched a colleague have his spanners x-rayed, although what they expected to find inside spanners was beyond me!
The best way to deal with it is to make sure you are within the rules, and don't give the security guys a hard time, as they are only doing the job they are asked to do, no matter how daft you or I think the rules are, and most of the time they agree with you.
Still a PITA though