Beware of banned Xbox 360s loosed in ballooning numbers on auction sites and distribution lists featuring online classified ads. In the wake of Microsoft's ban of "a small percentage" or "around 600,000" or "up to one million players" (depending who you read), the Xbox-excommunicated are apparently leaping overboard to offer their 'modified' Xbox 360 systems rife with dozens of games, extra controllers, special revs of custom firmware, all for anywhere from a buck to the price of a new system on up to boutique (perhaps joke) pricing of over a thousand dollars. Last Wednesday, November 4, Microsoft's Larry 'Major Nelson'...