A bunch of confidential documents were accidentally shared by the city via Dropbox, and these bloggers downloaded them.

Some of the documents were newsworthy, and the bloggers published them. Other documents were private but not newsworthy (personnel documents with social security numbers, for example), and the bloggers did not plan to publish them (because they are good people and were not out to destroy innocent public employees). They are agreeing to delete those files.

“Return” in legal parlance means delete when the files are digital copies.