COVER STORY: RUBBISH! ....... [This Report is a LOL Scream !] Portland's top brass said it was OK to swipe your garbage--so we grabbed theirs.by CHRIS LYDGATE AND NICK BUDNICK It's past midnight. Over the whump of the wipers and the screech of the fan belt, we lurch through the side streets of Southeast Portland in a battered white van, double-checking our toolkit: flashlight, binoculars, duct tape, scissors, watch caps, rawhide gloves, vinyl gloves, latex gloves, trash bags, 30-gallon can, tarpaulins, Sharpie, notebook--notebook? Well, yes. Technically, this is a journalistic exercise--at least, that's what we keep telling ourselves. We're upholding...