There's a thread on LongIslandErotic.com with particularly dark undertones. It's about a sex worker Amber Lynn Costello who listed herself on the site; she was found murdered on a beach in Long Island.

On July 11th, 2010, a user known as “Humiliatrix69” posted on the site's forum, saying he met Costello at her home in West Babylon, paid her $200 for sex, and then was attacked and robbed by her baseball-bat-wielding boyfriend and another man. His rage-filled post sparked a revenge plot on the site that some think may have led to Costello's death.

A member called “italyrider” asked for Costello's address, and posted, “No one from this board needs to be involved. I have friends who can take care of this shit.” Humiliatrix69 obliged by posting the woman's home address, a description of her home, her phone number and photos by which to identify her.

Another user named Morrie, who claims he's an ex-con with connections, responded to Humiliatrix69's post saying, “Tell her we are all coming over there with baseball bats.” Three days later, Morrie made another post that said, “A friend of ours told me today that ‘You won't hear from those 2 girls anymore!’”

On September 2, 2010, Costello disappeared. Her sister claims Costello made arrangements to meet a john before she left.

Investigators say Costello, and the other nine victims found on Gilgo Beach and Jones Beach, are victims of a serial killer, but wouldn't comment on the possible involvement of LongIslandErotic.com's members.