When you chat with underage girls who knows if the person on the other end of the line is a Police officer? So it's better to not chat period. I am not sure if I agree with the tactics of luring people by acting like 15 year old girls. I mean you could be having a harmless chat with someone who you think is 15 year old. If the 15 year old girl starts to get a little raunchy then you might just go with the flow and then get busted. Like let's say the "15 yr old" starts to ask you questions like what are you wearing etc. Is it ethical to lure people like that?