Agree. The ratio of people talking about Bitcoin to people who know *anything* about how it works is astounding.
More informed slashdotters explained that those "expired" blocks have been purged from most miners.
When I first read the details of the Bitcoin system, this is the point at which I got a gigantic sinking feeling in my chest.
The documentation said, "Look, we keep a distributed record of all bitcoin transactions!", and I said,
"Well that does make it vulnerable to law enforcement, but that means it can't be stolen which is awesome." And then it said,
"And then after a while we throw those records out."
"...so all I've got to do is conceal my theft until the records get purged?"