This must be satire, right?
https://i.imgur.com/zFdITcQ.png
And if you are interested I also have a scattering-free, anti-jitter bridge to sell
For even more fun why not (re)read Sir Terry's oeuvre. Pissing yourself laughing is good for you.
From my limited observation of flat-earthers on YouTube, they at least seem to be willing to do measurements but then either misinterpret the results (due to lack of knowledge) or knowingly twist them to say what they want to say.
Audiophiles on the other hand seem to reject the whole idea of taking measurements.