They were joined by Chirag Bhatt of the office collaboration platform Flock as well as Chris Kelly who runs Survata, an online survey company.
But Facebook users absolutely do not have this level of control over the digital dossiers that Facebook collects about their activity on Facebook and beyond, nor do they have granular control over how advertisers can harness that information.
It was a room that didn't have a lot of sympathy for the 33-year-old Facebook founder who appeared in front of Congress to answer questions and apologize about his company's failure to protect users' information in the wake of the Cambridge Analytica scandal and Russian interference in the 2016 election.
Dillon said although Facebook's manipulation of users for "fairly nefarious purposes" is not a new process, many people are just now starting to realize the extent of their relationship to the company.
The University's School of Information has been studying the implications of Facebook and the information infrastructure for almost a decade, said information studies professor Andrew Dillon.
Of course, there may be a gap between people who say they deleted their Facebook and those who actually did. Yet thanks to a decade of data on students' privacy preferences, we now know that as time goes by, ever more users discover Facebook's privacy settings and figure out how to use them. A jazz drummer, he ultimately realized he would not make any money in music, so he moved on to technology, going on to work for both Facebook and Amazon. He had never heard of the widely used term "shadow profiles" to describe this kind of data collection.
Zuckerberg will take questions from the House Energy and Commerce Committee. If Facebook were a true bargain with users - they get a useful, free service in exchange for seeing advertising based on their interests and activity - then Zuckerberg should be comfortable explaining how it all works. In yet another announcement on 9 April, the social media network said it was tweaking what it calls "data practices" as well as information that third-party apps on Facebook can access. This comes as more Americans report having Facebook profiles-56 percent, up from only 43 percent seven years ago. But it's also a spooky reminder of how much Facebook must know about you and what you do in your daily life.