Your assumption is that anyone cares. They don't. How many thousands of people get banned from channels on IRC each day? Why is this any more important?
I don't see how my ban is any significant.
Suppose there was a topic that no one cares about. It was meaningless. Therefore, the only posts that someone would post was to point out that the topic was meaningless. This could very well be the case for the "typical message board."
And then I don't think the regulars at mirc.com forums have idiots. Meaning, no one there would care to "feed the trolls."
So suppose I posted a meaningless topic that no 1 cared about in mirc.com forums. I would expect to get "0" replies.