Honestly no, he needs to implement some kind of proactive spam filter. A new account posting SEO spam or openly mentioning code generators should be the easiest thing to prevent. And I'm pretty sure other fediverse instances have done that.
Probably more admins (or at very least, global mods) just for daily operations.
Also not the main issue now, but also some sort of removal federation even if it can be reversed in cases of bias. Because spam (or worse) removed on another instance shouldn't stay up here.