A good example is https://lemmy.world/c/documentaries
One of their mods, https://lemmy.world/u/sabbah, currently mods 54 communites despite only being on Lemmy for about a month and has never posted on c/documentaries (except for his post asking for people to join his mod team).
The other mod, https://lemmy.world/u/AradFort, has one post to c/documentaries and moderates 18 communities.
Does Lemmy.World have a plan to remove this kind of cancer before we start getting reddit supermods here too?
Edit: This comment shows how this is even more dangerous than I had thought.
Edit2: Official answer from LW admin is here
Admin owners can see IPs, which will grab most of the abusers who do this.
There are other less direct techniques that major social media platforms use to identify users with multiple accounts even on separate IPs, which Lemmy will certainly need one day.
For now though, simply using IPs is good enough until those more sophisticated algorithms are developed.