Let's admit it, life is full of irritants. Smokers who "smell like smokers". Fat people. Pets on kitchen tops in the houses of people you never met. Your friends' unhygienic habits/dirty houses. Someone eating loudly. Someone asking you to take your shoes off in their house and giving you their worn slippers. The possibilities are endless.
Do you go "Eww... boak, yuk, how disgusting!" to their faces in real life? or only here? Do you really think being disgusted gives you a right to be impolite/shaming someone/humiliating them? Or that you have 2 options: stay quiet, or say something gently and politely so you are not inconvenienced by the difference in the squeamishness levels?
I believe that shaming someone is counterproductive and rude, and is only done to make you feel better about yourself, at the expense of another.