What is this thread even. Blocking an entire instance, because a single community member annoyed somebody? I mean, sure, go ahead…

ML simply happens to be the instance hosted by the developers of entire Lemmy, so they spend the bare minimum on post moderation, because they have the bigger picture to focus on.

Now the screenshots show that a “mod” took action. A “mod” can be literally anybody appointed by the current mods of a community. Anybody can create a community, just like on Reddit, so this could literal have been anybody. You’ll encounter similar bans on other instances in time as they grow too, because people are free to make sub-rules to their communities, essentially each “mod” having their little dictatorship.