Most likely.
I would like to think an account like that would violate our server rules and face a ban.
But the content is being pushed in my feeds, they are making posts (from what I can see) to our community (including a recent one about options for not defederating, iirc), and we have obvious examples in this thread of bad faith behavior.
I've clocked at least one new sh.itjust.works account with only only activity in this post, which makes it suspect to me.
This thread is going much like the others the longer it goes on.
18 minute old account using the same language as used in the exploding-heads crosspost for "soft defederation". Not a good faith account, most likely.