I have no idea about what does or doesn't happen when lifting someone else's legs to waist height, and am not implying anything about that.

What I do know is how HN is supposed to work in cases like this: respond to incorrect information with correct information. Do not respond with snark, shallow dismissals, or internet tropes. If people respond by arguing back (though I don't think I saw that in the current thread), either continue to do those things while remaining respectful, or simply don't continue the discussion.

It's that simple! At least conceptually. It can be hard in practice, of course, because other people being wrong on the internet is so provocative.