Correct. When I fly certification test flights, or maintenance check flights, I will not sign off on a plane with a wing drop exceeding the certification standards. I would extend that any plane exhibiting too much wing drop should be rectified. To be honest, flying school airplanes are probably less the risk, as pilots intentionally stall them, so they're prepared to recover. It's the private airplanes, loaded up, and flown by pilots with little recent stall practice, which may bite worse when stalled.