@darius
I signed up in at mastodon dot cloud in April 2017 (via https://www.metafilter.com/166112/A-tweet-pretends-to-be-140-chars-but-a-toot-is-500-flat) but haven't been there in ages.
I haven't seen this instance on any any blocklists, and have never used a different instance, but my local feed has a lot of spam in it. I just...assumed that was the way it was.
No meaningful CoC, now that I look, and googling finds some wilw issues in 2018 and instance ownership changing hands, but not a lot of 'good' there. Ooh, a good opportunity to test migration.