That's the crux. When I was fairly new here I said I'd managed to skid my front wheel on tarmac on my new MTB with hydraulic disks, and the good Mr Saddle called me out on it (I was a bit taken aback by his robust style at the time, being a newbie here, but I've since come to respect his knowledge and his willingness to back up his assertions - and he's one of my favourite posters now). He was right - in truth, in my enthusiasm, I'd mis-described the surface.
So yes, when people make claims that don't sound plausible, opening up a discussion and asking for objective justification is a good thing to do. But I do think we can sometimes be a bit kinder to newcomers and to those who don't quite understand what they're saying sometimes.
Oh, and to pick up on that last sentence about "glaring fallacies, ad hominem and a good dose of blustering", that is what I think came to a peak of absurdity in the hi-fi world, hence my earlier analogy.