When a friend’s child ran up to us at a dinner party with a shocked
look on her face and proceeded to describe what one of the older boys
had “accidentally” stumbled upon on the Internet, we realized that the
time had come to impose some serious restrictions on Web activity in
our house. Enter Net Nanny, recently available for Macs, which helps
you limit access to the Internet’s darker corners. And while there are
parental controls built into OS X, they may not be strict enough.