Please. Captcha by default. Email domain filters. Auto-block federation from servers that don't respect. By default. Urgent.
And yes, to refute some comments, this publication is being upvoted by bots. A single computer was needed, not "thousands of dollars" spent.
Querying users, is actually extremely easy.
Query users, posts, and then performing sentiment analysis, is also extremely easy.
(From the database- that is)
The API is a bit limited.
I am messing around with the database right now.... and.. well, it maintains a LOT of data.