Leaks of read/write access to documents and GitHub, Dropbox etc credentials is certainly worrying, but location and author/photographer details in photo metadata? That's quite a stretch, and seems like the authors here are just trying to boost the numbers.

The vast majority (I would wager >(100 - 1e-4)) of location of research institutions is public knowledge and can be found out by simply googling the institution address (I am not aware of a single research institution that publishes publically where the location is confidential).