I understand the point of the thread fine thanks. It concerns me that you were gonged out at 15.5Kg which seems fairly speculative to me. I saw the website text you've mentioned too. Maybe the test has to be to ask you to raise the bag to the height of the overhead storage bins? I don't see why someone should choose a weight they think is okay. That's the same as having a weight restriction, but it'll vary by location and shift.
To make my stance clear, I'm actually a bit concerned about what other pax may put above my head. I've seen lockers come open in flight with the contents falling out. Perhaps the rule should be that you have to put YOUR bag above YOUR head?
