I just looked at a couple of my fics on FFN. I've been using :-: as a scene break, figuring that those are perfectly acceptable forms of punctuation that wouldn't be stripped by their stupid 'bot.
Apparently I was wrong.
And I'm damned if I'm going to go back over more than sixty stories and fix it. In fact, this tempts me mightily to remove my stories from the site entirely. I'd hate losing my reviews, though, and I still get random people favoriting and commenting.
I just don't understand why they do this. the HR tag is ugly as sin and I do use it--to set the story off from the Author Notes. Using it inside the story would be jarring.