Frustrated on a customer service call that’s going nowhere? Shout as loud as you want. Only the intractable rep can hear you. Say the same thing on Twitter with an @reply to the company and mountains will move. Your message may be the same, but now there’s an army of observers looking over your shoulder. The company doesn’t care about the quality of your experience; it cares about the public perception of your experience.
At a trade show, does the perception of your company matter more than your message?