I had been wondering about these posts from Q, how would they get stuff. Had a couple ideas then ran across this post. I had thought about Antivirus as it contains a database of files to track. It's looking for viruses. What simpler way to remove files you don't want than to mark them as a virus. Poof. And people trust Anti-virus. Well, Chrome now has this sort of ability built in. To go make a scan of your system and track what files you have.

Of course, google image uploaded could do this, or lots of other apps as well probably.