Yknow i think this whole debacle over "usb line" has really gone to show something, and that is that imageboards have shed the skin of being "le fucked up sites for hackers" to "open mic comedy clubs for autists" (consider that le good or le bad, at your own discretion)
Back in the mid 2000s, /b/ was THE sekrit klub. Back then, not as many people were online like everyone is now, making it even MORE sekrit. Today, almost everybody has their own phone and computer, but back then most people would just share one family computer. Or maybe own a laptop too.
Back then, you got points for being the most fucked up, hardcore, nazi CP watcher on the site. Because that's how it felt to use the site - it felt like using some illegal darkweb forum.
Nowadays, everyone and their grandma knows about 4chan. Not as many people know about this site but people are more acquainted with the idea of anonymous BBSes. 4chan is a big social media site up there with reddit and twitter.
So when people come to this site, they expect a sanitized environment such as the 'cuck. Back in 4chan's infancy, much like this site today, the rules were cloudier and moderation less organized. Since 4chan /b/ didn't have a topic, degenerates used it as a place to connect. This is the kind of place where "USB Line" came from, those are the kind of people that would've found humor in it.
Nowadays, the degenerates have overrun the normal posters and all that's left is just a husk of what was. Pedophiles still regularly use /b/ to post their AI generated child porn and loli.
Just some words to ruminate on.