Fuzzyknuckles, you said:
"Interesting target group. Are women in the "off-street sex industry" subjected to more violence than other women?"
That's her whole point! She's out to prove that they're NOT. The stereotype is that all sex work is dangerous, and she believes that high end escorting is/can be safe, which is why she's trying to get information. She's a criminology grad student and wants to contribute something useful to society. I think the community should support her, since she's trying to do something to benefit us.
Given that this survey has zero risk for discretion and safety, etc, I think it's selfish not to help.