I think as long as lemmyrs is federated with other instances, accounts from those instances can freely post or comment here, right? E.g. with the account I made here, it looks like I can post on beehaw. So I think there's still a potential risk of bot/troll posts from accounts that are registered on a different instance, right?

Similarly, it is very easy to create new complexity.

The minimum version for Jerboa is now 0.18, so this makes lemmyrs on Android require a browser (or I guess an outdated Jerboa).