Since new social networking sites are abounding, here's my idea:  When a child asks for something and asserts that "All of my friends are..." or "All of my friends have..." as justification, you can go to this site and query the parents of said friends (or query your friends who are parents) to confirm or deny the claim.  Not that what a child's friends do or have should be particularly relevant to one's parenting decisions, but at least you could verify or refute the assertion.

Ever wonder how the major airlines can have full planes and low customer satisfaction but still lose money?  Then read this excerpt from "Young Fliers See the Film, Be It PG or R":

“Parents have to be responsible for the actions of their kids — whether they shouldn’t look at the screen or look away,” said Eric Kleiman, director of product marketing for Continental Airlines.

and this one:

Mr. Kleiman, of Continental, agreed, saying: “People love Pepsi, and we don’t serve that, so there you go, we just ruined their flight. That’s an accurate analogy.”

Let's try another accurate analogy:  Eric Kleiman being a director of marketing for Continental is like a moron being director of marketing for an airline.  No, wait, that's a simile.  But an accurate one.