1. Agree with them morally or not adult services are going to benifit bitcoin
2. this is the fourth "adult" service available to my knowledge it is possible that there either needs to be an adult section in the marketplace or adult oriented services need their own forum
3. prositution is legal in the uk although forced prositution is not, however the "mostly east european" specification does raise eyebrows if only out of curiousity why their herritige would trend in a single direction.

Full disclosure of the four services i'm aware of one of them is my own
https://bitcointalk.org/index.php?topic=41811.0