Facebook has broken its silence two weeks after the Christchurch terror attacks in response to the shootings being broadcast live on its social media site.
In an open letter released online today, the company says it's now "exploring" restrictions on who can live stream videos.
But Chief Censor David Shanks says it's too little, too late.
"I think what we're just starting to realise is that as well as being a terrible attack on this nation and on our values, we've suffered possibly the most harmful media event ever inflicted on the people of one nation," Mr Shanks said.
Otago University's Alistair Knott says the proposed move would not stop many people from live streaming.
"When you can violate community standards on Facebook and if you do that, Sheryl Sandberg is suggesting that you could also lose your ability to live stream, but you can't imagine that's going to catch many people because you can just make a new account," Mr Knott said.
In the days after the attacks, Facebook said it removed 900 edited versions of the 17-minute video, but it has faced extensive criticism over the absence of permanent changes.
On Monday, New Zealand's privacy commissioner slammed Facebook, saying the lack of response was "an insult to our grief".
Today, he told 1 NEWS Ms Sandberg's letter shows Facebook has still done nothing and that it could all happen again.
Mr Knott added, "They need to be made to think about the social good and at the moment, that's not happening, but we can certainly compel them to think that way by making laws".
Facebook had earlier announced the banning of praise and support of white nationalism and separatism on its platform, but Ms Sandberg's letter did not reference any policy changes to live streaming.
"In terms of this announcement, is it a good start? Yes, it is. Is it enough? Not at all," Mr Shanks said.
Ms Sandberg says everyone at Facebook stands with the victims and their families, but CEO Mark Zuckerberg is still yet to make any comment.
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