The solution they settled on comes from a company that knows something about sorting through a lot of interlinked noise to find a signal: Google.

FORBES: A Better Way To Filter Twitter's Spambots? Ask Google

After much brainstorming, we settled on a grade-based solution, which I wrote about last month, ultimately letting the girls' performance in school decide how much freedom they'd have in using computers.

WSJ: How to Keep Control of Kids' Online Use