http://www.engadget.com/2010/12/29/hackers-obtain-ps3-privat...
"Sony didn't bother generating any random numbers to secure the blasted thing."
Not to bash Sony, but I think the interesting point here is that creating secure systems is actually a really hard problem. Creating usable secure systems is an even harder problem.
See Schneier: http://www.schneier.com/blog/archives/2009/08/security_vs_us...