I have noticed that any photos stored in iCloud can't be deleted.
You can turn Photo Stream off, but if you turn it back on, the deleted photos come back, even if you delete your iCloud account, when you resign, the deleted photos come back.
So I guess, you have no control of your photos in iCloud.
You can turn Photo Stream off, but if you turn it back on, the deleted photos come back, even if you delete your iCloud account, when you resign, the deleted photos come back.
So I guess, you have no control of your photos in iCloud.