PV, "Does this mean I can now carry the Kensington lock for my laptop without fear that I might use it to garrotte someone?" that's a good one. I never thought about that!! Have they stopped you with this before? I have not used mine for a while so have not had it x-rayed recently.
Mind you, I did cause mild concern a few years ago, bringing a 1910 vintage telephone through from South Africa. That big double coil, the dome of the bells and a solid external casing looked VERY good on the x-ray!!