It has already happened in the past. Repeatedly. There's news coverage about this at least once a year. And it doesn't require using Shodan as there are plenty of open-source tools for scanning the Internet nowadays.
For example, this was from the same news website a few years ago:
Jeez, that's a pretty impressive dumpster fire. And it's been going for half a decade. Kudos for keeping track of it and periodically doing your part in reminding the world.
For example, this was from the same news website a few years ago:
https://www.bleepingcomputer.com/news/security/massive-wave-...
I've also written about it many times:
https://blog.shodan.io/its-the-data-stupid/
https://blog.shodan.io/its-still-the-data-stupid/
https://blog.shodan.io/the-hdfs-juggernaut/
https://blog.shodan.io/elastic-data-exposure-grows-to-3-2-pb...