BoingBoing: Firewalls are broken:

Firewalls are predicated on the notion that trustworthy people are inside your network and untrustworthy people are outside your network. Despite the obvious untruth of this -- the CEO goes home with her laptop and is treated as untrustworthy; an employee opens a trojan and has his box r00ted by a script-kiddie in Belarus, and is still treated as trustworthy -- we persist in using them, and then get surprised when they fail.