The padlock bridge- paris. . . Or is it a metal toss?

What is this thing even called? As far as I know this is a wonderful eyesore that I hope never goes away. Apparently there is a bridge over the Seine River in Paris where couples inscribe their initials or names and anniversaries on a padlock the attach it to the bridge. The next bright idea is to throw the key over into the river. I have two problems with this. 1) what if you break up and take your next bf/gf to the bridge and hello! There are you and your Ex's padlock bright and shining on the fence for all to see. Ouch. If you are going to put a padlock above the river which I btw think is adorable. At least keep the key! Make a necklace, put it in a locket, give it a pretty box. But don't throw it out! Unless there's a ring on that finger, keep it. 2) there are animals in that river! you want them to choke on your love sick hunk of metal? Call me weird but I don't want to be having a romantic walk along the river and look down and see a duck croak. That's just cruelty. The moral of this is, keep the key to yoself.