I've seen this several times - not just on MN, but on other parenting sites as well. Poster asks when she should mention to a man she's interested in that she has kids, as she doesn't want to attract paedophiles. The other posters act as though she's some sort of paranoid nutter.
Why the hell wouldn't child abusers seek out single mothers? It's got to be the single easiest way to get access to a child. He dates the mother, asks her to move in after a year or two, and then he's literally living with a child. How many women are going to refuse to leave their child alone in the house with their partner/husband now and then?
There's far less safeguarding involved in moving in with a family than there is working with children. And if a child tells their mother that their teacher/football coach/whoever has abused them, the mother will go straight to the police. If they tell her their stepdad abused them, a lot of women will be torn.
It's well-documented that there are so many people out there who were sexually abused by their stepfathers growing up, so why do people act as though this is an urban legend? Is it guilt/denial about the risks of bringing an unrelated man into your children's home?