The thought behind the post is worthwhile to ponder and discuss.
Personally, I don't think it's as dire as the text makes it seem. The speculation that a steadfast refusal of showing text only on PF might lead the AP protocol guardians to include a dummy pic in every post seems to me to be in the "possible but outlandish" category.
If the premise of AP was that every user should be able to see everything everywhere then defederating from certain instances shouldn't be possible. But that's a feature, not a bug.
The tree of the fediverse is big and nobody needs to saw off any branches. A picture only branch can sit next to a hypothetical text only one. I can see an argument that newbies to those particular branches could be more explicitly made aware of the filtering they will experience. While I was reading the text about the users who thought they saw everything from Mastodon on PF, my first thought was: this strains credulity. But then again, users are dumb. I hadn't realized for a while that shared posts don't show up in my PF feed on the app either.
I don't think anybody could become too big for their breeches on the fediverse because the fediverse is in no position to challenge the incumbent corporate platforms. Don't get me wrong, I love it here and on Mastodon (and on PF). But if you come from those polished centrally organized platforms and you're not willing to invest at least a little bit of time into learning how federating works (also refer to users are dumb above), you'll already be disappointed and put off before you realize you now need to also become your own algorithm. The threat scenario that PF could become so big that it can dictate protocol also presupposes that AP is the protocol that will endure forever. And with AT it already has a competitor waiting in the wings. As I said up top, the thought about how one dominating branch could damage the whole tree is worthwhile. But in a dramatic shift from this metaphor: we are in no position to have to cross this bridge any time soon.
Another reason why PF won't be getting out the chainsaw is its usability. It's only great for looking at pictures. It's terrible for having discussions about them unless you only use the website. I'm using the Android app and it's not great. Features came and went. The UI leaves a lot to be desired for me. It currently feels a bit abandoned because Dansup is more preoccupied with challenging TikTok. I still like PF because I go there just to look at pictures. I go to Mastodon for memes and dry remarks. And I don't feel like I'm breaking the protocol.
This image may be a bit wonky but convenience stores don't go out of business just because 24h supercenters exist. They both exchange ice cream for money but one of them has a bigger selection of flavors. PF is 7/11, Mastodon is Walmart.
Did you call the police when he sounded the siren at night? Like 999? From what I read here there is enough there to get him cited if not arrested.
You need to keep a paper log of every incident. Keep it factual, just answering the w questions, no "dickhead was a dickhead again", just "Mr Smith turned on his radio at very loud volume at 6:30am on 6th December." "I asked Mr Smith about the loud noise on 6th December at 6:30am when I saw him outside in his driveway at 9:23am. He told me he did it on purpose."
I would call 999 for every noise complaint in the night and every threatening remark made against your brother at any time. You need a stronger paper trail for people to do something. You've complained to your council and you've talked to the police. It seems that wasn't enough.
Don't retaliate with loud music or deliberate harassment yourself. It might be hard not to. But you need to be spotless victims. You don't want a 'let's look at both sides' to give the impression you provoked anything at any time.
How is the third semi detached party feeling about this old guy? They must feel some of the nuisance? Surely they could corroborate that your brother isn't doing werewolf things at night? See if you could get them to write letters or call the police as well. The more neighbours join in, the better (but don't start a poster campaign, it should look "natural").
Is there something that can be done to stop foxes from coming into the gardens? If they are the "werewolves" here then this could be a way to root out that delusion.
Does the old guy have family? Is there a way to reach out to them? Not in "reign in your fucking dickhead father!" but "we are really worried about your father's mental state because he keeps making outlandish and unsubstantiated statements."
Can you google if there is a solicitor in your area that will maybe hear your case for no or a low fee to see if you can take this to court? Either the old dickhead or the council for not doing anything about him? That's where the paper log might be useful.
The only word of warning I would leave here is this: you said you're all not at your best. Taking legal action will be additionally stressful and will cost money and time. Another thing that would cost money and time is selling the house and moving somewhere else. In the interest of your mental health, you should probably discuss this first, which path to follow. And although it is cynical, you also need to factor in that this problem will resolve itself naturally, probably within the next decade.
Neighbourhood disputes are not great. Your home should be your castle and somebody is shooting cannonballs at it. I've seen one case in my parent's friend group that started with a fence encroaching on the other property, more than a decade of lawyers going back and forth, accusations of tyres being slashed, police calls for any minor infraction. This can consume people. Don't get consumed.