[quelltext]

> I mean you mention anime characters, but there's a big greaser / rockabilly subculture in Japan.

There isn't, though.

There are probably a dozen or so in Tokyo and about the same number in Osaka. Granted, I don't have an exact number but it is super niche. If you ask a random Japanese person the chances of them even being aware of that subculture is very low.

> This is normal human behaviour. While I also think it's a little strange, it's harmless. Let people have things.

No, it's not. Some of your examples are but going all in isn't normal even if we ignore the fact that being part of a subculture kind of isn't normal by definition. If it were normal we wouldn't get an article about it from the BBC, would we? But what I rather mean is, doing that as a dress up thing or LARPing is reasonable. Using some old items or wearing old fashion for their unique appeal is also reasonable. Putting anachronism above all else isn't normal, though. Those Japanese greasers use mobile phones.

Arguably, we don't know how much of what the article describes is tongue in cheek, and perhaps it's mostly a character the guy is playing. But if not, hating to or avoiding to use modern technology because it's not from the era you happen to like (because of your grandpa's POW diaries, another can of worms right there) is quite off.

I'm not saying he shouldn't enjoy what he's doing or "become like the rest if us" but no, really, it's not normal (and maybe that's okay).

[dudul]

If by normal you mean "part of the norm" I guess not, but so what?

People have hobbies, passions, etc.

What criteria are you using to be the judge of what is harmless or not? What Is reasonable and abnormal?