the thing with removing a square taper crank is that you need the removal tool and a wrench, my crank removal tool plus a wrench does add x weight and space. I guess if it was a real advantage and given the type of trip, thats ok, but I'd certainly prefer not to have to take those extra tools with me.
My travel bike has regular square-taper Shimano 105 cranks and I remove the arms for packing it in a suitcase. Removal and installation is done with a single Allen wrench (the special dustcap acts as the removal tool). It's been on over a hundred trips and I've never had any problem removing or reinstalling the crank arms - they come off with significantly less effort than I've had with pedals.
No airline agent has ever asked me what was packed inside my suitcases, only whether I had packed them myself. I'm sure the TSA scanner shows that there's a bicycle inside, but that's separate from the airline check-in counter