I don't like it. I just don't see any point beyond the reason people tatoo or mutilate their fish like deliberate stunting and that nasty craze of cutting tails off.
It's just something to cause aggravation and possible problems later on. It reminds of the other stupid things we attach to our pets like silly dog shoes, coats, ribbons and so on.
So now you've done it and some think it looks "cool". Just give yourself a pat on the back, you made your fish so unique and made a lovely big and got all the attention you wanted. Now you can take the metal off your fish