ie. topic boards with ephemeral linear message threads
This describes a general forum format, but you might mean chan imageboards specifically. There have been federated imageboards for a while, but they’re very niche and experimental and I don’t see the value. The two examples I’ve heard of are NNTPchan (2015-present, NNTP protocol) and Fchannel (ActivityPub protocol).
There’s the related imageboard webring, but there’s no actual federated interaction between the boards, it’s effectively just cross-advertising to allow easier discovery.
The complaint is that they’re a leech on society, and proud of it.
It doesn’t matter if a practice is ancient and common. So is organized crime. Being old and normalized doesn’t imply it has value.
There is absolutely huge moral and ethical, and pragmatic, issues with hoarding essential resources, such as housing. Homelessness is a growing problem, and these people are gladly treating it as a money-making scheme. Society would be better if they had productive jobs instead. As a collective, landlords are responsible for systematic preventable homelessness and death. Most moral frameworks consider that very bad!
The middle class? As far as I’m concerned, the two important classes are the worker class and the owner class, and the leeches can’t survive without the host. If there are people tricked into thinking they’re a middle class above us, they’d better figure out that they’re a thousand times closer to us than to them, hopefully before our collective desperation turns to violence.