There are a couple of mentally unstable peeps around. It wouldn't surprise me if it was one of them. Likely harmless beyond the spam aspect

This seems like this is the main community: https://lemmy.world/c/Unlimited_Freedom_Eternal

That community description is something. Here's just the first paragraph:

The Name: “Unlimited Freedom Eternal: League of Individuals”, It translates to “INDIVIDUALISTIC YET HIVE MIND GAIEN SUPERORGANISM (Federation)” it means a scalable, high-level alliance of free kings and queens who together create an eternal, self-regulating, super-powerful living force just like a Gaian superorganism at any scale (planetary, cosmic, or multiversal dreams)!

Someone's put a lot of effort into this. They're creative at least.

Do you have a link? While "spam" is not a problem yet on Lemmy, I agree that we have weird users sometimes.