Am a bit at the 'it looks disgusting' comments.
A lot of views seem to be based on some form of faux-snobbery ie the we're all so middle class, we're SO much better that those common council estate types who pierce their babies ears etc.
I am of the view that if you don't like it, don't do it. But I fail to see any need for it to be illegal.
From my own experience, my ears were pierced when I was young, but for ill-health they would have been done as a baby. I remember going to my GP to have them done. It hurt no more than a pin prick. It never became infected or sore.
I had another piercing done when I was an adult at uni, didn't bother cleaning it properly, it got a bit sore, took earring out and hole closed up. So being an adult is no guarantee of 'safe' ear piercing, just as being a baby doesn't mean it will all end in pain, infection etc.
I have DSs not DDs. If I had DDs their ears would have been pierced as babies. With my DSs, I have left it up to them as whilst almost every woman I know has pierced ears, very few men do. So far, DS1 is not interested, but DS2 had his done at 7.