I have amassed a collection of seven (!) toques over the past ten years by picking up discarded hats from the ground while walking our dog. I take then back home, dunk them in some oxyclean, run 'em through the washing machine and then use them. :P
(I've also found four pairs of gloves, two replacement hub caps for my car, a couple scarves, several perfectly serviceable sweaters, a couple t-shirts, some pretty cushy sports knee pads, etc. I have seen,but not picked up several pairs of underwear, dozens of single socks, and at least twenty perfectly serviceable suitcases. How the hell do people lose all this clothing while walking around on the sidewalk???)