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

In some cases the group had flagged suspicious postings that were common names with slight misspellings, said Susan Fox, the group's founder who oversees 15 moderators.

WSJ: When Nanny Ads Lie

Wes Anderson's Fantastic Mr Fox, which featured the voices of George Clooney and Susan Sarandon, kicked off the event in 2009.

BBC: Tim Burton's Frankenweenie to open London Film Festival