If no-one is interested in your opinion, it stands to reason that they're not interested in the opinion of anyone in the thread. If they're not interested in the opinion of anyone, then why even have the thread?
Consider two examples:
Have you ever been mischeivious?
Imperial star destroyer vs battlestar
In the first thread, which are the more enlightening responses? The ones where people actually explain the mischievous things they have done, or the people who just give some form of a 'yes / no' answer?
In the second, there is a number of complete spam responses, but there are also a number of people that have taken the time to post some really throughful and detailed responses.
We're not trying to kill threads, we're just trying to make threads more interesting. Its basically the same argument on trying to communicate with teenagers. Ask open questions, not closed ones, or you don't get a particularly enlightening conversation out of it.
You know:
How was school today?
Fine.
What did you do?
Nothing.
Well, you can't have done nothing. Did you have any tests?
No.
What did you do at lunchtime?
Nothing.
I see this as being similar to:
Forum thread: Which is better: Cat or a dog?
response 1: I like dogs!
response 2: Dogs rule!
response 3: lol cat!
response 4: Cat!
response 5: I prefer bugs.
Forum threads should be the equivalent of open questions, and this can be achieved by asking people to justify their responses.