If I share a Google Photos album, other people who view it see a Download All button at the top of the page, as shown in the screenshot below. You should be able to see it yourself if you visit this album.Is there any way to prevent that button from being shown? I've looked in my Google+ settings under Photos and Videos, and the option Allow viewers to download my photos and video is already unchecked. 
Can I Disable the Download All feature on a shared Google Photos album?
google photos