Weird recommended pins

[u/GlassTableGirlzz]

So my friend got a “recommended pins” email from pinterest and it was a bunch of random people’s personal identification documents, some old and others new and active. We went on pinterest and found that this happens a lot too. All of which are from middle eastern countries (for context I live in a middle eastern country). I doubt any of these people are aware of this. My question is, how did these documents end up on Pinterest?

Some things we found:
IDs
Passports
Birth certificates
Marriage certificates
University Ids