I am from Brazil, here ISPs do that because they aren't Cloudflare. For example many ISPs explicit write in their contracts that hosting ANY kind of IRC-relate

I am from Brazil, here ISPs do that because they aren't Cloudflare. For example many ISPs explicit write in their contracts that hosting ANY kind of IRC-related content, be it a server itself, or tools, clients, or articles about IRC, will get you banned from the ISP. I believe ISPs do that because IRC in Brazil is script-kiddie magnet, as soon some new IRC-related stuff is up, thousands (I am not kidding) of lamers will DDoS you, and some will try more serious hacks. Similarly in Brazil, hosting games is also frowned upon, usually game hosting companies are owned by major ISPs in first place, that rent their servers to people that want to create a game server, yet, hosting games is necessary too, Brazillians are so good at being assholes that they are frequently automatically banned from other countries (example: Combat Arms, irc server AfterNET, and a couple others have Brazil, or most of Brazillian IPs in their ban table.) Brazil also had the dubious distinction some years ago (I don't know if it still applies) as the leading country in producing "website defacers", so even your port 80 isn't safe. So at least here, sadly I can't complain of centralization, here it is very possible that if you put a website on your raspberri PI, it will take down the entire city internet down.