Over here in Europe, we had a fatal accident a few years ago due to the same sort of issue as was discovered by NHRA during the weekend.
It was tragic of course, amplified by that it was a 64-year old spectator who was killed by a part from the racecar's flywheel.
I was in the tower doing color commentary. I still get very upset about it and AFAIC, a DQ is nothing. Something along the lines of at least a 3 race suspension would make damn sure that it does not happen ever again.
From the police investigation:"Those engine parts [...] were allowed to escape from the car because that housing was 'insecure because of the omission of six lower retaining bolts'