That's true, and I don't necessarily think it's a good thing to shut down debate, but I don't think it's also perfectly valid to take whatever action you want to avoid argumentation if you choose. I don't want to go do something I enjoy, but feel less inclined to do so on the basis I might get into an argument with some jackass. Not everything requires me to debate in my daily life, and ignoring people I don't care to engage with changes nothing about the outcomes of the subject matter, most of the time.