I use tildes "~~~" a lot to break up some colloquial and light-hearted text instead of harsh full stops, or bland dashes; but then many comments become spoiler-black-bared..
I'd love to be able to switch a setting to ignore all formatting rules and have a reverse-escape character if I want formatting, which I \* sometimes \* do...
This would also be handy for things like poetry or song-lyrics, which are a huge PITA to share because the line breaks are lost unless you massage the text.