Hi exbayern,
I too have travelled to Dubai,Edinburgh,Venice,Rome,Copenhagen,Brussels,et c as well as many US airports-Atlanta,LGA,JFK,DFW,ORD,BNA,SNA,SFO,Monterrey,Hous ton,Charlotte,Norfolk,etc.Until recently,I too never had a problem. I was asked several years ago by a novice TSA to disconnect my pump at San Diego and told the guy no in a very firm voice and he backed down.
However, in Copenhagen on August 30 I had an agent AND supervisor who refused to read my doctor's letter or Medtronic sheet stating that pumps cannot go through X-ray,MRI,CT or scanners,was told I had to get written permission in advance to opt out,etc. Luckily for me they did not have a WBI at that airport but they still put my loaner pump through the xray machine as well as my sensors-for that behavior I did get an apology from the airport!
I then contacted LHR who told me that they do not let anyone opt out of random selection for WBI screening even with a doctors letter. Just trying to cover my bases for any possible future travel.
I am so glad for you that you have had trouble free travel, but all it takes is on really bad experience like I had recently to become pretty anxious about flying.
I have been corresponding with the various airports in a tone to be educational,proactive,etc in the fervent hope that I can make travel for diabetic passengers less stressful. From what I am seeing, LHR is a big problem right now.