I accidentally untarred archive intended to be extracted in root directory, which among others included some files for /etc directory.
I went on to rm -rv ~/etc, but I quickly typed rm -rv /etc instead, and hit enter, while using a root account.
I dunno, ~/bin is a fairly common thing in my experience, not that it ends up containing many actual binaries. (The system started it, miss, honest. A quarter of the things in my system’s /bin are text based.)
~/etc is seriously weird though. Never seen that before. On Debians, most of the user copies of things in /etc usually end up under ~/.local/ or at ~/.filenamehere
I think the home directory version of etc is ~/.config as per xdg.
I use ~/config/* to put directories named the same as system ones. I got used to it in BeOS and brought it to LFS when I finally accepted BeOS wasn’t doing what I needed anymore, kept doing it ever since.