I recently was flying with KLM from Liverpool via AMS onto Cape Town. I was a little worried that my bag might be just a little to heavy. It was about 3:30am and I spied myself a row of empty check-in-desks with all their scales switched on. I had an idea, I could weigh the bag myself and then return the least needed item in it back to my car before I actually checked-in. What a plan! and they said Grammar Schools were a waste of time...........
Now I'm not inferring anything and am just passing on my experience.
It just happens that these check-in desk were lets say for a budget airline that charges for every conceivable extra that we take for granted with the major airlines and the colour ORANGE was prominent. So I man-handles my bag onto the nearest scales and it shows at 23kg - bang on the limit! MMM best try another ORANGE one next door....22.9kg. Fair enough me thinks, I'll take a flyer. So off I toddles to the KLM check in desk and guess what? 20.6kg.
Form your own conclusions.........