There's no such thing as appropriate moderation at Twitter scale. It's societal techology we as humans do not have. Underlying moderation is some shared vision of decency - morality claims that should be enforced via justice. These claims certainly don't exist across nation borders, and they barely exist within a given nation's borders.
The bot moderation conundrum is a wholly second moderation question layered on top of the first. How do Twitter accounts map onto human bodies? Is it 1:1, like government ids? 1:many so brands can have accounts? many:1 so humans can amplify their voice? Until this is answered all moderation actions taken in the name of 'bot policy' is capricious. As is the assignment of blue checkmarks.
Reddit struggles with these same problems at website-scale, where moderation must work across subreddits. They only appear to have a better solution because some topics at subreddit-scale make enough of the questions I raise irrelevant that you can install a goon and have them moderate via edict. Just like chat rooms and message boards did in the old days. To make that point a little clearer: you can be off-topic in a subreddit or an Orange Site thread, but you can't be off-topic anywhere on Twitter.