I can see a generational shift where one of the next few gens just breaks off and goes back to analog tech, libraries, in-person communities, hand written content, etc. Some will go hardcore offline, most will only use the internet as the need arises (GPS, work/legal documents, weather app level things.)
But for the vast majority... the internet is devolving into Idiocracy. The next centuries will be the AI stupid/dark ages with wars started over disinformation.
Or maybe climate change shrekts us in the next 50 years.
Vigilante mobs arise when the "legal" systems fail to maintain the social contract. Either they arrest him or the mob does.
Keep posting this filthy murderer's information, ALL murderers need to have their information posted everywhere until justice catches them.