Yes, there is a compact mode in the user settings. It looks a lot like old.reddit. You can see it in action at http://retro.piefed.com/ but it can be used on any instance.

We have someone who does it every day. Makes an account, posts lots and lots, then deletes their account.

I added some code to PieFed which automatically deletes posts by new accounts that self-delete. It worked so I had to use my lemmy.world account to reply.

It’s a LLM. Look at their comments, very formulaic.

https://lemmy.world/u/domx?page=1&sort=New&view=Comments

Mods, here are the goodies that await you as a moderator of a PieFed community - https://peertube.wtf/w/ce995f49-5209-4f39-9d0f-8db36eebbaf6

e.g. the Reichstag fire where Nazis burned down their own parliament to frame their enemies.