Single mothers have been warned by Queensland police not to include details of their children on their internet profiles.
The caution follows the appearance of a Canberra man in court accused of flying to Queensland in the belief that he had arranged to have sex with a mother and her 13-year-old daughter.
Geoffrey Robert Thompson, 55, from Campbell in the ACT, had unwittingly been communicating with a police investigator when he arranged the meeting over the internet.
He appeared briefly in Brisbane Magistrates Court on Thursday charged with using the internet to procure a child under 16 for a sexual act.
Thompson was intercepted at Brisbane Airport on Wednesday night by detectives from the Queensland Police online child exploitation branch, Taskforce Argos.
The crown did not oppose bail, and the court heard Thompson would return to the ACT later on Thursday.
The matter was listed for mention in November.
Inspector John Rouse from Taskforce Argos says pedophiles are now targeting single mothers on dating websites, to get access to their children.
"Unfortunately there is with the internet a dark side and these guys are using that as a portal to try and find victims," he told reporters outside court.
"If you're going to utilise internet dating websites, make it about you.
"Don't put information on your profile page saying 'I am a single mother with three beautiful children that are my world', because effectively that's what they're looking for."
Insp Rouse said women don't realise how an innocent image or scrap of information they put on the internet could be used by pedophiles.
"Tragically, a lot of these people are now grooming single mums with children and it's not, unfortunately, for the legitimate purpose of finding a new relationship with the mother."