I hve 8 sets of the HF tall jack stands. 1 bent, but not how you're thinking. I parted out a 78 F250 (kept the axles) and I had to turn one side ways on the frame. When the flat bed started to pull on the frame to load, the truck fell on it. The truck also fell on the other and since it was correctly placed, it stood up to the load drop.
The 2 pairs are still holding my Bronco project up in the garage. It's been 4 yrs.. (yah I know, get it done already).