Read about 5 simple best practices to consider when curating content. I agree with Steve Rosenbaum (http://mashable.com/author/steve-rosenbaum/): there should be some boundaries, or in other words, some ethics. It’s important to be reminded of providing clear referencing of information and image sources. It all comes down to a commitment to quality.
cc licensed (BY NC SA) flickr photo by chrisinplymouth: http://flickr.com/photos/chrisinplymouth/4269125357/