Comment Wrong. (Score 4, Insightful) 193
His assumptions about the nature of information sharing and privacy are dangerously wrong.
The problem of information sharing is inequity; if it turns out that he documents his presence at a laundromat on some random dull October day, and later it turns out that some terrorists used to meet up there, his documentation of that random laundromat appearance will put him under scrutiny all over again - without any concrete reason. Meanwhile, some other fellow who rode his bike and paid with cash and didn't document his life on the web will probably never be scrutinized.
There is a fundamental issue with all mass intelligence/data collection: Humans don't understand conditional probabilities.
When we start to use large databases of essentially random data to inform investigations, we greatly increase the likelihood that investigations impact random people.