Same for me, but that glorified auto complete helps a lot.

Under the Privacy settings, scroll down to the Website Advertising Preferences section. It’s the only setting in that section.

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It seems like you’re assuming that file modified times are fixed…? Every piece of metadata like that can be altered. If you took a picture and posted it somewhere, I could take it and alter it to my liking, then add in some fake exif data as well as make it look like I modified the image before your actual original version.

You can’t use any of that metadata to prove anything.

Exif data can be faked.

Do you do any online banking? Do you ever log into any sort of health provider website? These are just two examples of a nearly infinite list of highly private information you would not want other people seeing.