We have lived many places in our 34 years on this earth, but we've never lived anywhere with more lackadaisical mail carriers than San Francisco.
The list of rotten service we've experienced staggers us on recollection. When we moved here, we lived on Fulton between Broderick and Baker in a moderately-sized apartment building with mailboxes like these. Our mail carrier would frequently unlock the main lock for the boxes and leave it open. Like, for good.
When several residents (SFist included) ended up with our mail stolen and wacky charges on our credit cards, we asked the post office why this negligence occurred. Their response? "It was more convenient for your mail carrier to leave it unlocked." Well, no s**t, it also made things more convenient for some random person to put $1500 worth of Fleet enemas (not a lie) on our MasterCard.