you state that asking for sources is, and I quote: "a rather unsubstantive contribution".
You are now telling me I should be citing a source.
If I were being snarky I would ask if you would mind raising your signal/noise ratio as you did with the other poster.
I mean, which is it? Is asking to source the claim unsubstantive or not? Is it only unsubstantive if there's a claim against you personally?
As for allowing others to make up their mind, that would be what the poster in the other thread was presumably trying to do, and you shut him down. And that's really the point.