Mongo databases are open in the wild! Here's a Proof of Concept scraper!
Apparently people still leave out open databases out there in the wild, here's how to scrape them.
Put one leg ahead of another. Just kidding. To run, change address on line 75 to your desired address and
python3 mongo.py
This will (or atleast try to) scrape the contents of the target database and neatly place them into data/ according to their filenames. I've only tested this on "perfect-conditions", so expect stuff to not work. No guarantees given.