Well, that might work for the dumber pedo's out there, but I'll ask a question: Do you think a *serious* pedo is going to give out real information, hasn't thought about the possibility that the person on the other end might just be a cop? There's a reason I'm called "Dill Pickle" and not my real name, say, "Lee Felton"...
Whenever you meet someone online, it's something to keep in mind....you have no easy way to check a person's age, sex, or location....or anything else they tell you about themselves.
There's also some risk in being a vigilante like that....you expose a pedo like that, going to jail, do you think he might not want to hurt you? For this reason, cop's addresses aren't public knowledge. Also, you need to consider the possibility of getting sued and losing...suppose I pose online as my enemy, Mr Clinton, with my (former) address at 1600 Pennsylvania Avenue, Washington DC? When you "expose" Mr Clinton, who has done nothing of the kind (not with children, anyway), Mr Clinton can sue you for defamation and damages...and since your accusations aren't the truth, it's slander and you are liable. (US law, the truth is an absolute defense against slander)
Best to warn children of the possibility of predators and try to send them off....let the cops know that catching a pedo through the public part of *our* chat rooms is gonna take a long time...
Dill Pickle