Just read the whole thing. I'm a bit surprised that anyone managing any PR position would ever respond like that, especially when looking back at the initial messages. I've always been a strong proponent of at least trying to use some sense of punctuation, grammar and so on. Taking the time to construct the responses is an indication of respect, especially when business is involved. Overall, I'm reading this and thinking that the exchange not only reflects poorly on the manufacturer, but if I'm following this trail right, it's actually a marketing firm that was hired by the manufacturers to pass all this on to customers.
The fact that this PR guy decided to not only rail against one of his customers, but against one of the most prolific sites amongst his targeted audience and the expo that is hosted by said site shows that he is not only offensive but out of touch. I seriously hope more gets added. This guy's behavior has made me care even less about the product and more about a slow-burning desire to see him wishing to repent.