This behavior makes me extremely suspicious of anything produced by someone who displays it. Back when I was in academia, I had a similar experience. Someone g

This behavior makes me extremely suspicious of anything produced by someone who displays it. Back when I was in academia, I had a similar experience. Someone gave a talk and I immediately had doubts about the method used. It was known in a related area that methods like the one presented tended to appear more accurate than they actually are. So I spoke with the researcher privately after the talk. I didn't expect this researcher to know about the problem, and I think I said that it's possible everything is okay but some extra checks need to be done. They seemed interested then, so I sent them an email with some papers on the problem. I never got a response, and their paper was published without even mentioning what I said. The paper now has over 100 citations and that research group has built on the method I had a problem with.