Well, it might help catch some guys.
For example, I have seen many sting operations on Dateline NBC where they entrap these predator guys. They send pictures of their private parts over the internet and talk dirty in IMs, leaving a cyber trail. They are invited by the person posing as a teenager (either girl or boys) and these guys come right to the address given where they can be arrested.
So if it helps catch any of these guys, it’s worth trying.