Pantsing and Stripping Forums

It's dark cos Higurashi When They Cry started as a series of murder-mystery games. So the initial manga and anime adaptations of it were basically adaptations of all the possible game endings, and thus were full of the characters killing each other in horrible ways and being secret (or not so secret...

Writing stories (or even just long posts) in a forum always comes with the risk of this happening.

You're better off writing them in Notepad or a word processor and then copying them in.