It is understood the men were threatened with a knife but were not hurt during the incidents. It is believed that Indian males were targeted.
Counties Manukau police Detective Sergeant Eddie Sutherland said it was understood social media was a popular way to communicate but urged people to be vigilant because cases of people being lured into dangerous situations were becoming more frequent. "The public need to remember once information is disclosed via online sites it's there forever. Meeting up with individuals you may have met through the internet could put you in danger.
"Always meet in a well-populated public place and make sure someone is aware of your movements."
Netsafe executive director Martin Cocker said the web allowed people to cast a wide net for potential victims and that also allowed people to deceive for long periods.
"Obviously at the point someone goes to meet someone or transact money or something like that, that is the point they need to stop and think about what the dangers might be."
Mr Cocker said criminals often had a number of "marks" on the go. "They make each one feel as if they are in a one-to-one relationship but they are after a large number of targets. They are prepared to invest in that over a long period of time."
internet dating meant people were becoming comfortable meeting others online which was both positive and negative, he said.
The South Auckland case is the latest in a series of social media scares.
This year Auckland woman Natalia Burgess was exposed for taking another woman's Facebook account and pretending to be her in order to meet young men. She assumed a number of identities.