And no matter how big that big-ass sword is, you won't stand out in a crowd. Nobody ever crosses the street to avoid you or seems to be especially shocked or alarmed when a heavily armed gang bursts into their house during dinner, rummages through their posessions, and demands to know if they've seen a black-caped man. People can get used to anything, apparently.
Crono's Complaint
The less the main character talks, the more words are put into his mouth, and therefore the more trouble he gets into through no fault of his own.
Maginot Line Rule
It is easy to tell which city/nation is the next conquest of the Evil Empire: its streets are filled with citizens who brag that the Empire would never dare attack them, and would be easily defeated if it tried. (This smug nationalism always fails to take into account the Empire's new superweapon.)
I identified some of those as coming straight from some games that use them... the Maginot Line Rule in Skies of Arcadia, for instance, and several from Lunar...
And yes, this is pretty funny. That's why I had to link it. :)