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.
Just saw a WAVE of bot art flow down the "Top New" feed. It then promptly stopped. And then when I reloaded the page, it was gone. So I think it's working...