I am trying to remove all my photo stream as I have imported pictures into events that I wish to keep. When I remove the entire photo stream on my iMac they then redownload the images from the iPad and iPhone. This repeats non stop. WTF? To follow up as I just do not have time for this, I have had enough of Photostream until I can simply remove the items I wish from my Photostream on my iMac and have that spread to my other devices, as well as import images from the stream to events in iPhoto I shall disable Photostream indefinitely as it is just a substantial waste of what little free time I have attempting to get it to work correctly. And I feel it is far more efficient that I just do a manual import when I get home.