Police street blitz in St Kilda as prostitutes use smartphone apps for client meetings Police will start a blitz on prostitutes and kerb trawlers next month. VICTORIA Police is facing a fresh battle to rid St Kilda of street sex workers as prostitutes turn to smartphone apps to arrange meetings with clients. Force command says it is powerless to stop the new trend of virtual red light areas as police continue to get tough. Girls as young as 14 have been found working the corners and there are fears now tech-savvy teen street workers could go unnoticed. Police will hold a meeting with other agencies in coming months in a bid to devise a strategy in how to combat the new trend. But as part of a blitz on prostitutes and kerb trawlers, starting next month, police will follow cars containing the street worker and client, and wait until they are engaged in an act before they pounce and fine the couple. Police will use a range of tactics, including using female officers posing as sex workers, to catch gutter trawlers and rid the area of its seedy society. St Kilda's Sgt David Morrow said police were horrified when they found a 14-year-old girl selling herself for sex and 16-year-olds working the corners. "We are members of the community ... if you come across something like that, you would be upset and concerned," Sgt Morrow said. He said phone apps presented police with a new challenge and it was unclear how widespread it was. That makes it very hard to police for us. We know it's occurring but how do we police it? Sgt Morrow said. It's definitely something I need to think about. He did not rule out police trawling apps.