Only thing I can think of would be to spin up a new instance, subscribe to the community, and then run queries against the db directly to identify bot or troll-like behavior in the community
Previously I would have said to just browse the community from Kbin because it used to expose a lot more user activity, such as upvoted/downvoted posts/users, but I believe that's no longer visible...
Hopefully as Lemmy continues to develop, more tools become available