I hate to sound like a whiner, but something that's always irked me are people that deliberately break page formats by posting excessively long sequences of characters. Derivations of "whaaaa" being one of the popular ones. These wind up forcing the horizontal scroll bar to pop up, and posts that would otherwise be reasonable paragraph chunks turn into two or three sentences where you have to scroll back and forth just to read their contents.
80 characters, to my understanding, is what is considered the traditional line length. Would it be possible for any "words" that break this rule automatically get truncated to 80 (kind of like site links, but without the clickability) and bumped to a new line, or even filtered to say something stupid like "MY FINGERS GOT STUCK TO MY KEYBOARD" to help maintain an easy browsing experience?
I suppose this also extends to thread titles that break the tables of Forum Categories link.