I curiuos as to why a firewall, properly configured, would not have
protected Josh Glazebrook from the FBI?

According to the news reports
(http://www.vnunet.com/vnunet/news/21...-teen-spyware),
the FBI installed routine CIPAV spyware via myspace to this kid's computer
which tracked
The computer's IP address
The MAC address
The person's username
The last URL visited
A list of open ports
Computer programs that are running
The operating system
The internet browser and version
The computer's registered owner
The IP address of every computer which the PC connects for 60 days

I'm curious.
Would a properly configured firewall have prevented this?

What was the weak link here?