You just explained the problem in a nutshell. First, you admit that you didn't even see the thread (IIRC, it was up for a couple of days), but then you assumed it would have gotten into arguments (which I agree with PP who said it was pretty civil) and would have gone "poof" BEFORE it degenerates.
So, if you (general) can anticipate which threads will go "poof" (because they're being 'headed off at the pass'), why even start one? I agree with
@DCLMP on that.
Where I disagree with him (her, they, whatever) however is it's our choice to frequent not only the Dis but the community board. Do I wish we had more freedom to discuss certain topics? Yes. But I'm too lazy to go looking for a new site that allows it.