So,let us converse.
1. "IMHO, the NCNS database should be seperate from the review process, but should show up in conjunction with her profile." Or why not have its questionnaire activated via an offramp from the review form, linked via a high-ranked button that says "No Call/No Show" and, "pressed," jogs you over to to a different survey/ventingplace from the questionnaire for reviewers, with different questions (like "How long did you wait before giving up?"; "How many times did you try to meet her before realizing this would not happen?; "How many different excuses did she supply for non-appearance?")
One could imagine many others. No doubt our readers will offer a few!
2. " Additionally, each entry should allow for a brief response from the lady in question. This would allow her to explain a given instance (bad vibe, inappropriate phone conversation, whatever) but would still easily allow a pattern of this behavior to be seen and noticed." This is exactly right, and I absolutely endorse your proposal.
3. "Placing highly in searches can make a huge difference in a girls income. With the system you suggest, an otherwise responsible lady risks a 0,0 review if she decides not to keep an appointment for any number of legitimate reasons." I see your point, certainly, and it is again very valid.
Fraud reviews exist, and we should not increase the incentive for anyone to spend time to manufacture multiple net-identities so as to be able to swamp us with bogus NC/NS.
Perhaps the 0,0 could come up via an initial link by provider name, yet not be calculated for the production of the averages? But yet a calculation could be made of the proportion of all reviews that are 0,0s, or 0,0s from different IMPs? How can we best raise the cost of fraud, and/or lower its rewards? (staff views?)
3. "It also opens the door for rivals or others with ill will to easily lower a girls average by posting bogus 0,0 reviews, which wouldn't be thrown out as uncharacteristic due to their very nature." This is a good point, and worrisome, though less so if the 0,0s don't lower the average (item 2 above). I do not have an immediate answer to the fake-review problem, which I belive is very real.