My personal experience has been that Dubai (which I believe is one on the list?) has some of the highest security I've seen. Everytime I go through it as a passenger connecting on another flight (not leaving the airport) I've been though security (shoes off x-rays e.t.c.) after leaving the plane and getting into the terminal proper. In addition there were spot checks in the waiting lounge before actually bording my onwards flight (on one trip, not all) where my belt was swabbed (presumably for explosives?) and I was asked to turn on my laptop to prove it worked. Never had that happen anywhere else.

The Dubai people have always been great to me. They are intrusive but they are polite. They don't make you feel like a criminal or that you have done anything wrong. Being spot-checked in Dubai isn't anything as embarrassing as being surrounded by TSA agents angry because you forgot a thumbdrive in your coat pocket. In Dubai I feel like a customer purchasing a product. At US airports I feel like a peon asking permission to borrow bossman's car.

Yes politeness goes a long way in such situations.

The one time I've had anyone take a closer look at my computer equipment was an old iBook "yo yo" power supply. But that was a weird design for a power brick and not exactly a popular brand at the time. They probably looked pretty strange on an xray.

On the other hand I don't fly often, so I'm not much of a data point.