But not all parents welcome feedback about their caregiver, said Susan Fox, the founder of the Park Slope Parents website.

WSJ: Parents Patrol Nannies Online

The well-oiled machine that is the Park Slope Parents listserv diagnosed a similar problem before Bococa and began requiring parents who post recommendations for nannies to agree to an integrity code.

WSJ: When Nanny Ads Lie

Park Slope Parents has the advantage of infrastructure.

WSJ: When Nanny Ads Lie

The Park Slope Parents listserv put in place extensive guidelines for nanny reporting in 2006, after a listserv member posted about twins who weren't dressed warmly enough and the nanny in question turned out to be the twins' grandmother.

WSJ: Parents Patrol Nannies Online

And, in a certain sense, this is probably true: how many parents in Park Slope or Brentwood would trust their three-year-olds to cut the grass with a machete?

NEWYORKER: Spoiled Rotten