Questions

many people want to restrict access to their photographs, at least initially, but few want the inconvenience of remembering and entering a password.

for them we added the Limited access option - the images Folder is assigned a unique Identifier in its web address, like: f7281044, it will then be accessible over a link, like:
https://netcells.net/photographed/user/36/view/f7281044/1
therefore, anyone you send the link to will be able to see the images - this simple measure is sufficient for most people.
robots are banned from the images page but, of course, the Internet being what it is, not all robots obey - for this and other, rather obvious, reasons such access limitation becomes less secure with time - until the Indentifier is reset or Folder removed altogether.