4chan is one idea about how people can talk online with total strangers. The conversations my friends and I have at the pub are very different from 4chan, but also very different from Facebook. Recording everything you say so it can be played back years later in a job interview changes things, and I would say not for the better. But our conversations also don’t sound at all like 4chan threads, where it seems like “ironic” idiots talking to idiot idiots.