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.
Spam and vote manipulation are the two biggest concerns.___
Votes are visible to the world, unlike with Reddit, so that'll be vulnerable to data analysis on behavior.