The most appalling brand tweets ever

US Airways's jaw-dropping, cringe-inducing, termination-justifying tweet sent on Monday may actually be the worst brand tweet of all time. I know, because I just scrolled through roughly two dozen "worst brand tweet" lists ... and nothing quite compares to @USAirway's XXX image of a lady and -- shall we say, a creatively placed model plane. (The airline has since explained, to no one's satisfaction, that another user originally posted the image, which the airline then re-sent "inadvertently.")