Mine (received at TTTE, I recall) pinged the scanner at Inverness Dalcross about 15 years ago! The security guy told me that I couldn't take it on board but that he would post it south for me! I asked him if he would like to keep it - he was over the moon and so mine is lurking somewhere in the north of Scotland!
Strangely, the Heathrow Security system never even noticed it northbound a few days prior!
Bloggs