Blues&twos
Agree with you.
I always have a bit of a grin when I see an A/C "tied down" with for eg., a couple of plastic cans filled with water or blocks of concrete. How will they secure an A/C in a good gale? 2 x 20kgs blocks of concrete would be about the weight of "half a pax". If the A/C fuel tanks were empty why not fill the tanks and throw away the blocks? There would be more weight.
Light A/C need to be secured with augers, stakes 2 at secured right angles, in the ground or blocks of concrete buried in the ground.