Reuters

Facebook Inc has often angered users by its handling of personal information. Almost as often, Chief Executive Mark Zuckerberg has apologised.

He did so again on 9 April in written testimony to US Congress, and will likely repeat that on 10 April and 11 April as he faces congressional committees looking into Facebook’s management and protection of user data.

Here is a collection of Zuckerberg’s apologies, from the earliest to the most recent, in which he acknowledges mistakes and promises to do better.

September 2006

Facebook started aggregating posts from each member’s friends into a new feature called News Feed, which was not a major privacy issue but agitated many users.

Zuckerberg said: “We really messed this one up. When we launched News Feed and Mini-Feed we were trying to provide you with a stream of information about your social world... We didn’t build in the proper privacy controls right away.”

November 2007

Facebook introduced a feature named Beacon that told a user’s friends what they just bought, unless they blocked the disclosure of each purchase. It took Facebook several days to recognise it had a problem and to quell the outcry.

Zuckerberg said: “We’ve made a lot of mistakes building this feature, but we’ve made even more with how we’ve handled them. We simply did a bad job with this release, and I apologise for it... Instead of acting quickly, we took too long to decide on the right solution. I’m not proud of the way we’ve handled this situation and I know we can do better.”

February 2009

Facebook changed its terms of service, and its users reacted with suspicion.

Zuckerberg said: “We’re at an interesting point in the development of the open online world where these issues are being worked out.”

April 2010

The Wall Street Journal reported its discovery that Facebook allowed advertisers to access unique user IDs, which can be used to track consumers. It took the company a month to respond as the outcry from users and privacy advocates grew.

Zuckerberg said: “Sometimes we move too fast — and after listening to recent concerns, we’re responding.”

He continued: “In the coming weeks, we will add privacy controls that are much simpler to use. We will also give you an easy way to turn off all third-party services. We are working hard to make these changes available as soon as possible.”

November 2011

Facebook signed a consent decree with the US Federal Trade Commission after an investigation of its privacy violations.

Zuckerberg said: “I’m the first to admit that we’ve made a bunch of mistakes. Recently, the US Federal Trade Commission established agreements with Google and Twitter that are helping to shape new privacy standards for our industry. Today, the FTC announced a similar agreement with Facebook.”