During Yahoo's Flickr press event this evening, CEO Marissa Mayer responded to a question about restricted content on Tumblr, and confirmed that Yahoo has no plans to cull controversial material — meaning Tumblr's porn is safe. "It's the nature of user-generated content," Mayer said, answering one of the most pressing questions for many users of the service since rumors of the $1.1 billion acquisition began to swirl. However, Mayer promoted Tumblr's existing "NSFW" (not safe for work) tools to label controversial content on the network; "It's really important to have great community tools like 'NSFW' that Tumblr already has in place," she said.

Mayer's comments specifically answer a question that was merely suggested this morning, when she wrote about the acquisition in the Yahoo blog. "Tumblr is incredible special and has a great thing going," Mayer wrote. "We promise not to screw it up."