“These are hard issues and no one is going to pretend that when independent board members do things it’s going to be easy for the companies,” Sandberg said. She added that had Thiel involved Facebook directly, things would be different: “If he did anything with Facebook resources, that would be a Facebook issue.”

As many have previously noted, Mark Zuckerberg, Facebook’s CEO, has been a staunch defender of free speech. After Gizmodo reported on the inner workings of Facebook’s trending news team, in which a former contractor alleged that conservative stories were suppressed, Zuckerberg himself defended the platform’s purpose as one that encourages conversation and the free flow of ideas:

Facebook stands for giving everyone a voice. We believe the world is better when people from different backgrounds and with different ideas all have the power to share their thoughts and experiences. That’s what makes social media unique. We are one global community where anyone can share anything — from a loving photo of a mother and her baby to intellectual analysis of political events.

To serve our diverse community, we are committed to building a platform for all ideas. Trending Topics is designed to surface the most newsworthy and popular conversations on Facebook. We have rigorous guidelines that do not permit the prioritization of one viewpoint over another or the suppression of political perspectives.

As Buzzfeed notes, Mark Zuckerberg controls the majority stockholder voting power and Thiel is up for re-election at Facebook’s June 20 stockholder meeting:

Whether or not Zuckerberg is forced to address the Thiel situation at the 11 a.m. stockholder meeting at the Sofitel San Francisco Bay in Redwood City, his thumbs-up, or down, vote will be the most forceful statement he can make about his board member — a man who some argue is setting a chilling precedent for media companies that publish stories not to the liking of powerful billionaires.

Will Facebook, a company dependent on publishers for the content that fuels its News Feed, stand by a board member seeking the destruction of one of those very publishers?

In February, Zuckerberg criticized comments made by another Facebook investor, Marc Andreessen, who sent out a series of tweets about Free Basics and Facebook in India that many found offensive. Zuckerberg wrote that he “found the comments deeply upsetting, and they do not represent the way Facebook or I think at all.”

Sandberg, however, dismissed similarities between the two situations.

“When he did his tweet, it almost looked like he was talking for Facebook,” she said. In Thiel’s case, Sandberg said the distinction between the person and the company was clear enough. “We decided not to comment,” she added.

[Disclosure: Facebook has launched a program that pays publishers, including the New York Times and Buzzfeed, to produce videos for its Facebook Live tool. Gawker Media, Gizmodo’s parent company, recently joined that program.]