I had this same issue with something I bought online 2 months ago. Local post office did nothing and needless to say I didn't get my package. I had to eat the money I spent. If the place I'm buying for offers it I will not order!
Its all explained in the comments, "maybe a homeless guy lives in the ravine and those are his packages." WTF
LOL
Really though, if I saw that shit, I'd be confronting the fucker with the camera, not hiding with it from the balcony.