Good thing this system doesn’t scan browser cache, then. Unless you’re programmatically extracting photos from your browser cache and uploading them to iCloud, which would be a pretty impressive way to make sure you’re using up all your storage.
Ok, here is something that happened that could have triggerd this:
Back when I used WhatsApp I got a lot of nice photos from friends and family there.
WhatsApp doesn't (at least didn't) have a way to export them but I could find them on disk and I had an app that copied that folder to a cloud service. Problem is this folder contained all images from all chats.
Now I'm not very edgy so most of my pictures are completely non-problematic (in fact I don't know of any problematic ones), but once in a while someone will join one of your groups and post shock pr0n.
I've long since stopped backing up everything since I use Telegram now and it allows me to selectively backup the chats I want.
But I wanted to mention just one very simple way were doing something completely reasonable could result in an investigation of an innocent person.
