Not knowing who would bite and whether they would know what they are talking about. I disagree with you completely. I was dating a provider five years ago that had this exact situation. She lived in LA and maintained an incall in San Jose where the easy tech money is plentiful. She flew up Monday morning and back on Friday night for the weekend with me. She was physically roughed up by a customer who also took back his donation and the money from another customer earlier in the day, total $1000. She had a couple of small bruises but nothing that would not heal in a few days. She called the police, who came out to take her statement and gather evidence. Disclosing as little as possible in this situation is just not possible without making false statements to the police.
She explained what happened and after the investigation they charged her for solicitation because she admitted the way she knew him was as a sex customer and that she was being paid for her services. (If she withheld this info and told them something else, then they get it from the perp, then she can be charged with making a false statement to the police.) There was so much male DNA and so many fingerprints at the incall, they told her that it may take awhile to isolate the evidence that puts him at the scene. They eventually isolated some DNA and got a match on a guy at the address she had for him. He plead out for a fine (which goes to the county, not the vicitm), 15 days in the clink and probation. Anybody here think that's enough to deter this guy from doing this again? Who knows if any of the other guys who had DNA or fingerprints there were bothered by the police. If they were embarrassed by being questioned, that's just collateral damage.
Next step is what CKS suggests. Hire a good local lawyer. Her lawyer was able to make a plea deal as an assault victim for no jail time and two year's probation and attendance at the county hooker-aversion school for 40 hours, which mitigated the charges against her. If she completed the school and had no arrests for two years, she could ask that her record be expunged, and it was, so she now has no record.
Total attorney bill for the case and the subsequent expungement of her record . . . . .$5500. Cost of moving her incall, which had been exposed for what it was in the apartment complex during the police evidence gathering. . . . . $7500. Now if you think that all of this is worth calling the police over rough sex, then go ahead and double down on your post, but my advice to providers in this situation is that if the damage is only a couple of bruises and mostly your pride that is hurt, shore up your screening, blacklist the guy, and move on. In this case, it would have been a financial loss of only $1000. Instead, it came to $14,000, PLUS 40 hours lost at sex-worker aversion therapy and having your name in the court system while you are on probation. Being a crusader is expensive, as you can see from this real-life example. OTOH, if you are assaulted to the point you need medical attention, then you have no other choice but to call 911.