You're making the mistake of thinking like a slashdotter,where you're absolutely right in your assessment. Allow me to paint a better picture of the average person whose data is actually involved.
1.) Registration with fake information? That's "sensible skepticism", a holdover from the earlier days of the internet. In the 90's, 1234 fake street, 123 maple street, and 12345 main street were quite crowded buildings. Since vanity and exhibitionism has become the norm on the internet, it's quite common to actually write out "Kyle Castillo, 672 Spruce Place, Schenectady, NY 18421". No one questions a request for an address anymore.
2.) E-mail addresses have become a bit more of an identity than they used to be. Google 'voyager529', and you'll see a whole lot of information about me...and 'voyager' isn't even really my name. Moreover, since "firstname.lastname@example.org" was deemed an 'unprofessional' e-mail address to have, 'Kyle.Castillo@gmail.com' became much more common. Thus, having an e-mail address that's actually tied to you is more identifiable now than it was in the past.
4.) A child's chat log may not be noteworthy in itself, but remember that it's pretty simple to trick a child into something. If a particular child is targeted, and a person has enough information deemed important by the child to convince that child to follow them, it's possible to make a rather ugly mess because the child isn't likely to figure out that everything that is known by the stranger are things from the chat logs.
Why am *I* worked up? Because this seems like, possibly, the one hack where people might actually wake up and pay a bit of attention. For once, "Think of the children" works in our favor. For once, the levels of fear that *should* have been present elsewhere are worth considering. Under false pretenses and as a result of a generation who gets their computer jargon from primetime TV? Yeah, I'll admit that...but it's not like the majority of people beyond Slashdot have cared otherwise.