Re: don't look at them.
As part of an investigation I was asked to carry out a few years ago I had to spend half a day retracing the browsing habits of an employee. A full morning of having to go through and categorise someone elses porn habits including a site that I didn't bother trying to get past the big "FBI has impounded this web page, it is a criminal offence to go any further" splash page.
If I could possibly have avoided looking at the content I would have but, you know, sometimes it's part of the job.