Good info Mark for sure. I am retired Fire Department and all our rated webbing, ropes, hardware etc was designed to yield by a safety factor of 4. So a 4K web would be designed to take a shock load of 16K before it would yield. Any equipment we had -that had any shock load was thrown away. I cant say anything about other rigging that you can get outside the FD such as Sears of Harbor Freight but it could be rated the same way.
People should keep an eye on their lifting appurtenances and keep them inspected and cleaned and not laying outside in the sun or weather.
You are 100% right on the use of cribbing and jackstands. In my 32 year career, I pulled three people out from under vehicles that died from a bottle jack tipping over or a vehicle that rolled forward or backward. We tend to get complacent in our own garages thinking they are safe havens and they are only as safe as we keep them and how well we practice safety.
Steve

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration