[AmericanInTokyo]

These guys are WEIRD.

Yep, I have seen a　few of them (where else, but in Japanese convenience stores, usually near the manga magazine racks). Almost seemingly oblivious to the world around them. If you struck up a conversation with them, such as "nice day", they might be staring into space through their thick coke-bottle glasses whilst picking their nose, and not even recognize you are talking to them, such it is as many have actual true social relations with other human beings outside of their family members. Sick. Truly into cyber existence only, in fantasy dream worlds.

[AmericanInTokyo]

correction: “many” = “few”

[TigerLikesRooster]

S. Korean equivalents of hikikomori are constantly pestered by their parents to get a job, but would rather lock themselves into cyberspace, chasing one commie conspiracy theory to another.
In a few cases, these guys got into heated shouting match with their parents, and ended up killing them. They may be passive in appearance, but are angry inside.