How long were you saving that one up?
I kinda like that “rule” (if there is one).
Here’s an example.
Someone writes an OP in the Pit complaining about his company and the cops for picking on him after he punched some guy out.
On the Dope, the responses would largely be. . . serves you right for punching someone out.
On other message boards I’ve been on, the response might be. . . oh, what a bummer that life is so unfair!
I like the fact that people here hold others responsible for their behaviors and for the inconsistency of their statements.
I wasn’t actually, but, after seeing this thread linked to, I just couldn’t resist!
**
Another unwritten rule, at least for the Pit, is no lame OPs. Or else.
How pointless is too pointless?
Good night, Auto. Good work. Sleep well. I’ll most likely fire you in the morning
Chain of thought party fun time
I fed my nuts to the squirrels in the park.
I discover the girl I like plays for the other team
How many fingers am I holding up?
That’s it Japan! You exceeded your cute quota yet again!
A werewolf gets drunk just before the full moon. Then what?
What are you thinking right now at this very moment?
Let’s all talk about badchad more!
How hard can I hit some-one in the face with a trout without killing them?
Could I shoot a squirrel with a supersoaker?
Abandon hope all ye who click on this link
And finally… Could I have buttsex without knowing it?
:dubious:
You missed one 
Seven and a half months, obviously.
Regarding this one:
I discover the girl I like plays for the other team - Miscellaneous and Personal Stuff I Must Share - Straight Dope Message Board
I’m really surprised no one mentioned the obvious—she wasn’t lesbian and had no interest in you, and made the story up to “spare your feelings”.
Not quite the best example requested in the OP. That rule’s been written numerous times.