If you want an even and well developed physique, then of course you should train your traps. Saying stuff like they are ugly implies that you are either (1) a female, or (2) not serious about bodybuilding and training in general.
Your traps are a very big muscle, they don't just make your neck look bigger, they also are vital for back thickness. If your serious about bodybuilding or training, you should train all muscles, regardless of if you think they are "ugly" or not.