In that case it was. But it might not have been. And so what? When we’re talking about bigger discussion question, whether or not the OP has made up his or her mind doesn’t change the fact that people in the discussion might enter with one opinion and leave with another, and those reading might do the same.
As you’ll learn, this site can be as much about the community discussing an issue with the other members and using the OP as a jumping off point as it is getting an answer for the OP. The question you mentioned had 99 posts – the first two of which were “no” responses. So regardless of the intent, there was a discussion where both sides were presented.
I’ll just bring up the irony here again, as that last post makes me think you don’t recognize it. You asked: “Don’t you hate rhetorical questions on fluther?” As a leading question, it is in fact more rhetorical than the example you give…it suggests that the answer should be “Yes.” Your most recent response claims that the asker of the other question has made up his or her mind on the issue and therefore the question is not genuine, so of course it is rhetorical, and of course it’s not a good question. But that statement compounds the irony of your question as it shows that you seem to have already formed your opinion, and that your question is not genuine, and you think people should agree with you and are trying to make a point rather than create a discussion.