Of course they think they look good in them.. Why on earth would they take them if they thought they were awful. There's a lot of different people and a lot of different interests and affections. Not everyone is like you. Diversity is what makes this world so damn great!
I think piercings work on some people really well, but I don't want any for myself.
I guess to them it looks good or else they wouldn't have gotten the piercing in the first place. Just because you don't think they look good doesn't mean everyone thinks the same as you. So yes, obviously there are people who like them and think they look good.
Personally, I would never get a facial piercing but I think they can look good on the right individual if it's in the right place.