Regarding the "sagas":
There are some of them (Roe's sister-in-law is the one I'm thinking of here, though Aeris' apply as well, as does Lotus') that continue because it is a genuine challenge: how does one remain polite to someone who is consistently inconsiderate and rude? How does one become more assertive without sinking into rudeness? Many of us deal with people like this in our lives, but for one reason or another, we don't post. Etiquette isn't the same for every situation, and what may work with a stranger on the street or the cashier at a grocery store won't work for your sister-in-law.
So, I see nothing wrong with:
1. Here's what Person did, what can I do?
2. Person did it again, it didn't work, what else?
3. Person stopped doing that, but has started doing something else, please help?
I see brides starting multiple threads about one wedding, because there are so many issues. Why can't there be multiple threads about one person ? I agree, if it has gone into the realm of "pure" entertainment (no etiquette question, or nothing the OP can do), then the Coffee Break folder may be a good spot for those, but several are very instructive and, IMO, belong on the board. Should eHelldame or the mods disagree, I will respect that, but I think there's a purpose for them.