Terminally online behaviour that causes the person to think that their behaviour is normal. You can immediately notice this by their inability to look at things from a third persons perspective, basically autism.
The Internet is, unironically, both one of the best and worst things to happen to humanity in the past few decades.
On the positive side, it allows anyone to exchange ideas and perspectives with anyone else who has a connection, anywhere on Earth. Accessing valuable information is easier now than at any other point in human history, businesses and governments can easily build the sort of communications network that an executive from 1985 could have only dreamed of, you can order a product from San Francisco, Paris, Guangzhou, or Gaborone even if you live on the other side of the Greenbrier Backcountry in Bummfuck, West Virginia, as opposed to being limited to the single Walmart that popped up like a fungus growing on a dead log and killed all of the local businesses off in less than five years, etc.
On the negative side, we're a species that evolved to live in small troops in tropical Africa, where our ancestors were probably very proud of themselves for the innovative changes they made to their close relatives' Acheulian handaxes. Instead of a single big rock with sharp edges, Malak!va over there can make all kinds of hide scrapers, arrowheads, and other tools by chipping at rocks soft enough to manipulate but hard enough to keep an edge even after you use it to avenge her mortally wounded brother. That cackling futanari giant mongoose bitch that got at his liver while he was asleep is going down, and you don't even have to go out to find a new rock. That's some high-tech shit if you're used to throwing pebbles across a stream at those stupid
Homo erectus fucks on the other side who keep mooning your extended family. You can blind those dumbass apes with science the next time they start trying to mock you by making it look like their assholes are talking, driving them to extinction and assuming lordship over a vast new world full of other cool animals that also need to go extinct because ecological catastrophe is badass, but...I mean, that's already pushing up against the boundaries and blurring the lines between what we can do with the inefficient, energy-intensive, and overly large meat computers that our bodies come with right out the box and what we really
should be doing if we don't want to poison our fucking souls. Once we got to the point where we needed to invent symbols to store information externally, we were already in uncharted territory. Warehouse-sized supercomputers, globe spanning underwater fiber optic cables, and memes with snarky-looking shiba inus are so far down the well that you can't come back up without a body horror sequence where you turn into something like a fluffy, gurgling terrestrial blobfish that can forever suffer but can never die.
We aren't really equipped for a world where we've got to sift through conspiracy theory bot posts in order to figure out whether there's any truth to the claim that Hitler descended into the hollow Earth and is now a human head with a robot body, building an army of
Yutyrannus-riding
Schutzstaffel from the pure Thulean bloodline that inhabits the Forbidden Mushroom Garden on the shore of the Lost Sea. We can talk to someone in Gaborone, sure, but half the time they're going to get an earful of creative new slurs that all involve some variation on the word "Nigger". Instant gratification isn't a thing that we're used to, or can ever really adapt to deal with. It's ridiculously easy for online shopping to turn into a self-destructive binge, especially with gamified apps like Temu using fun tricks to get impulsive customers to part with the money they need for important, real-world things like bills, food, and gas.
People have always created echo chamber hug boxes where they "Yes, and..." each other into the depths of extremism, insanity, or ridiculously detached bullshit, but that's so much easier online that the difference between Internet communities and IRL groups of people becomes qualitative. Fuck lolicon, I don't want to see that shit, but when people are so obsessive about it that they genuinely believe that people who view it should be buried face-down under the most secure part of ADX Florence so that they'll dig down to Hell rather than rise from the grave once the weeb magic ressurects their corpse, the whole, "They're just lines on a page" thing starts to go from being pedo apologia to being a pretty decent rejoinder. It's possible to take moral outrage way the fuck too far on a topic like this if you never hear any outside opinions from people who aren't pasty basement goblins ranting about how characters are really 700 years old, and therefore totally cool to dick down/ride like a mountain bike with a pogo stick for a seat. Perspective is incredibly important when it comes to content that's morally revolting, but ultimately doesn't involve any actual, direct harm to a real person. We probably shouldn't start applying obscenity laws more broadly because, while the slippery slope is usually a fallacy, it's hard not to see locking someone up and forcing them onto the sex offender registry because they have a "patently offensive" drawing in their browser cache as something that could genuinely end up being the start of a path to something completely unforeseen by the people clamoring the loudest to go on a road trip. By the time the community involved realizes that they're headed straight toward a sheer vertical drop into the depths of the howling abyss, someone else is going to be in the driver's seat, and they're not going to be able to hop off the ride.