Got a reply from the person behind @mastodonanalysis
"Thank you for your note and I apologize for causing harm. As part of a class project I was trying to explore the topological structure of mastodon and identify structures for creating safe spaces in other online communities. I chose this name to alert admins to my intentions. I thought that the only harm caused by downloading data could be server overload which is prevented by API limits. The last thing I wanted to do is cause harm to your community and I have stopped downloading data."
@ffeth Not much, but look here: https://tenforward.social/@guinan/98989563639745953
Mosts admins banned/blocked the bot. I contacted the owner to learn more (see https://soc.ialis.me/@admin/98991669668172738 )