Depends entirely on why she's asking for the DNR. Great providers may not want or need the promotion/word of mouth good reviews bring and want privacy instead. Funny enough though, even some of these ladies still have older reviews quoted on their websites and ads. Bad providers certainly do not want the publicity to adversely impact their business. Up to each individual, but PERB's DNR has fewer than 5 providers on it. You can certainly post a review knowing that good or bad, as long as it's true and tasteful, it's not coming down. We get requests often from ladies to remove reviews and well over 90% of the time, the answer is no. The ones that do come down are false/shill/defamatory or otherwise flawed.
I think the good providers are worth listening to and the bad providers should be exposed, but the choice is yours.