When Terminology Attacks

I was reading a mailing list today, as I often do. Some random guy, nobody I know, he posted a request for help. He said, more or less: "Hey, blacklist XYZ has listed my double opt-in server. What should I do?"

Approximately 13 seconds after posting, he was verbally attacked in response. He was accused of being a spammer, and ridiculed, for daring to use such a term as "double opt-in."

That's what actually happened. What could have happened instead is that they could have congratulated him, or at least made mention of how good it was, that he is actually utilizing confirmed opt-in.

Instead, a discussion forum made up of supposed thought leaders, people who actively work to stop spam, accused the guy of being a spammer. They didn't accuse him of being a spammer because he sends spam -- but instead, they called him a spammer because he used a term that they do not like.

What's wrong with this picture?