If an adult lures a 13yo for the purposes of sex, then he or she should have the book thrown at them hard. However, if the person involved isn't actually 13 (or a minor) then the court is correct...the elements of the crime weren't all there since what makes the act illegal is the age of the participant.
Wow, that will make it hard to catch these child molesters. I know plenty of cops, but since none are under 18 (or more to the point, 13) they would never be allowed to catch the bad folks...
What is supposed to make it a crime is that subject has the intent to lure a minor.
I don't know. That seems like a technicality to me. If they are telling the guy they are only 13 and the guy is still responding. I don't understand the difference between using a young looking 18 year old posing as a 13 year old. And using a 13 year old, that doesn't intend to have sex with you anyway, but is pretending that she will.
That "luring rule" taken to it's logical extreme, says that you can't prosecute until the perp has actually had sex with a 13 year old.