"I think what HD is trying to say is that many RAs (probably much more than 50% of them) are "nuisance advisories" and occur when ATC have provided the correct separation"
I understand what your saying, but its only a nuisance RA if he does level where he was supposed to. If you issue appropriate clearances to separate and traffic calls I would hope the accident board completely clears you. The one I worry about is the other pilots most of the time, not the controllers doing their usual stellar job of separating aircraft. We as pilots are keenly aware of the envelopes that will set off a RA and tend to fly outside those parameters. That is, to avoid setting off his or mine as we come within the 25 second CPA. That said, all it takes in a bit of inattention in one aircraft, a screw up on the automatics (using a mode on the A/P that may not capture altitude) heads down reviewing an approach plate, etc., and your legal clearance in voided and I'm in a world of hurt.
We simply have to respond, whether you think we are separated of not. Its not a knock against you, You did your job. I simply must fly as if I have your family in the back because I do have someone's.