Flickr has a massive amount of hardcore jpgs. That's where a lot of the images posted on Tumblr come from. Flickr just does a decent job of hiding it from the a

Flickr has a massive amount of hardcore jpgs. That's where a lot of the images posted on Tumblr come from. Flickr just does a decent job of hiding it from the average user. Here is a good (and mostly SFW as far as images) Flickr group that advises on how to work within Flickr's terms of service: http://www.flickr.com/groups/unsafe/ http://www.flickr.com/groups/unsafe/