[patio11]

There will almost inevitably eventually be an enterprising district attorney who uses "The defendant's computer is configured to automatically prioritize his email by his interests. We obtained a warrant for, and received, the contents of the defendant's inbox. The subject line of his most important email of the day: Lurid Kiddie Porn."

It will probably be used against someone who actually has bona fide interest in child pornography. Probably.

After all, cache contents and network logs are used to help convict people all of the time. Most of them are factually guilty, but the legal system probably does not see eye to eye with technically inclined members of this audience as to whether cache contents mean that someone intended or attempted to view the cached content.