I am sure if this was a real situation they would not go around saying 'hey want to strangle my children for sexual gratification?' rather, saying 'hey, ill let you take the children for sexual gratification whatsoever' And, i'm sure one or more undercover cops actually do go around chatrooms and find places where that type of person may hang out. It's like going to a bad part of town to look for crack dealers. Same deal. But, most people only accept the crack dealer situation, and dismiss the fact that cops also check chatrooms and other online enviornments to see if any potential illegal activity is going on.