So while some 150,000 video nasties have been purged from YouTube and two million videos screened since June for violent extremist content, Google is ramping up its efforts to sweep away extremists and hateful content.
For instance, Wojcicki says that YouTube will have 10,000 people working to address questionable content by 2018 - noting that human reviewers are essential to training the company's machine learning systems.
"Human reviewers remain essential to both removing content and training machine learning systems because human judgment is critical to making contextualized decisions on content", declared YouTube CEO Susan Wojcicki, who explained that "moderators have manually reviewed almost 2m videos for violent extremist content since June, helping train machine-learning systems to identify similar footage in the future", according to the news outlet.
"Now, we are applying the lessons we've learned from our work fighting violent extremism content over the a year ago in order to tackle other problematic content", Wojcicki wrote.
It said adverts for major brands were appearing alongside some of the videos, which led to several big brands including Mars and Adidas pulling advertising from the site. Equally, we want to give creators confidence that their revenue won't be hurt by the actions of bad actors.More news: UK Authorities Plan Crackdown on Bitcoin
Susan Wojcicki, chief executive of YouTube, noted how the video site can be used for good but also has a dark side, allowing bad people spread harassment, harm and hate.
"We believe this requires a new approach to advertising on YouTube, carefully considering which channels and videos are eligible for advertising".
Machine learning is key to this process, however, and YouTube has already harnessed it to great effect in flagging violent extremist content - as well as comparable comments - for human review.
Wojcicki said that while Youtube was a "force for creativity, learning and access to information" she had also "seen up-close that there can be another, more troubling, side of Youtube's openness".
Wojcicki said 180,000 people would have had to work 40 weeks to assess the same amount of content. "But no matter what challenges emerge, our commitment to combat them will be sustained and unwavering".