Actually it's because, like 90% of the yukkuris, you are buttugly and deserve to die. Mainly because in your standars ugly = uneasy = must die, sorry kiddo, it may hurt, but that's the truth.
Is it worth the time and breath trying to punish a yukkuri verbally? because they will just answer with some nonsense and be stubborn to death, even if it agreed with you it will be temporally and for sure forget about it very soon.
Well if you want them to awknowledge you and stuff? No just don't bother.
But, if you want to troll them, make them cry, make them feel offended, etc.? yes, it worths it, they do react to being insulted and people acting in defiance against their stupid way of seeing the world, regarldess if they don't understand the reasons behind such insults and defiance, and that's what matters.