I'm all for sanity checks by folks who know what they're doing... but sadly it seems like lots of QA/Safety people get promoted to the job after having screwed up something and cost $$$ and time and wasting peoples time is the only thing they really do well. My favorite is when they poke their noses in to witness a connector mate despite knowing f-all about what the connectors are and what they do- but OMG depart from the checklist that they don't understand either and theres all h3ll to pay.
The consequence of all that b.s. is, of course, a lot of work that ought to be better supervised and controlled happens on the d.l. just to get important things done. There have been a few times I'd have skipped going into the lab and cleanroom if I knew the old QA guy was sniffing around. I was fixing a server once and the tool kept interrupting over my shoulder about what I was doing, as if he knew anything about it.
His predecessor was pretty good- not super helpful and a bit fussy about dotting I's and crossing T's on documents that nobody cared about, but at least he had a sense of humor about the "work prevention" aspects of QA. That later guy though...