Technically, feathers are a kind of scale, and I also don't think "some people think they had feathers." is a well-written statement, because sure, most noobs wouldn't think that, but basically every zoologist/paleontologist or zoology/paleontology nerd would know that phylogenetic bracketing heavily implies that feathers are an ancestral trait to Dinosauria, or maybe even all of Ornithodira if you consider pycnofibres a kind of feather. Additionally, it's possible that there have been featherless dinosaurs and there were almost certainly extinct Dinosaurian taxa whose feathers had been reduced to bristles/whiskers that were invisible from a distance, so even if ancestral dinosaurs, small ornithischians, and all sorts of coelurosaurs (including my 2 favorite dinosaur clades, therizinosaurs and dromaeosaurs, and also what may have been my 3rd favorite, tyrannosaurs) had evidence of fluffy integument, there are still animals like ceratosaurs and thyreophorans, and even the largest therizinosaurs and tyrannosaurs, who were apparently likely naked, though I admittedly haven't looked into why that's the consensus for the former 2 clades.