<p><b>With the lines between media firms and tech firms blurring, coverage of the tech sector presents one of the most profound accountability challenges in modern journalism</b></p>
<p>The first time I visited Facebook’s office in Washington, D.C., I was asked to sign a nondisclosure agreement. I didn’t.</p>
<p>Then there was the time I got through an entire interview with a product manager at Apple, only to be told, after the fact, that it was presumed to be on background. “Everyone knows this is how we do things,” a spokesman explained apologetically. Nope.</p>