I’m still rather taken by XKCD comic no. 1305 – Undocumented Feature from just over a decade ago…

Alt: And it doesn’t pop up a box every time asking you to use your real name. In fact, there’s no way to set your name at all. You just have to keep reminding people who you are.

…though I suppose these days the final caption should probably be switched to ‘But at least it’s not fucking Reddit…’