The original article has an update (5/30) from a google spokesperson: “Chrome supports the use and development of ad blockers. We’re actively working with the developer community to get feedback and iterate on the design of a privacy-preserving content filtering system that limits the amount of sensitive browser data shared with third parties.”
Everybody traveling to the US needs a VISA, unless they have a waiver, which requires an ESTA, which requires some personal contact information. I don't know if the social media info will be added to the ESTA application, but it wouldn't surprise me. The visa waiver program also only applies to about 35-40 nations (there are 190 or so in the UN).
