Pesachim 8: Are Mitzvot a Good-luck Charm?!

Pesachim 8 - How and where to check for chametz during the official check. Does a wine cellar need to be searched? Oil storage? Liquor (or beer)? Fish? Salt? Candles? Wood? Dates? Shouldn't there be just a rule of thumb for storehouses! Also: Those on their way to do mitzvot are not harmed. But sometimes they do! Commonplace danger seems to be left to the responsible activity of the mitzvah-doer. What about after you've done the mitzvah and need to return home? Plus: Isn't Jerusalem the most special of all, in all ways? Perhaps not. Also, full-circle back to the discussion of checking the storage places.