Well, I reckon anyone who doesn't know the difference between "can" and "will" has a serious problem or is perhaps under 3 years of age.
And even if it did melt dust, which no one is disputing, unless in massive concentrations it will only accrete slowly and progressively degrade performance. Which is nowhere close to "stops it dead".
So I stick by accurately calling it utter fact-free misleading bolleaux.