I respect others right to do what they want, but personally I see it as cruel and unnecessary, if its a cultural thing then, we'll maybe it's the norm, and like the op says, she didn't think much of it as its totally normal!
I just can't get my head round it, why does a baby need to wear earrings? I think it's done solely for the parents benefit which in my opinion is wrong. I do think its a bit tacky, trashy maybe isn't the right word, but, as insulting as it might be, I would think chav if I saw a baby with pierced ears! Sorry!