Col,Aye, WTF is all that about? We have that here as well, though on nothing like that scale. Up the road from me, there is a fence round an electricity cabinet, and it has a single padlock on it! It looks so lonely. What's it all about?
Actually just lifted this photo off the internet. The only place I ever saw "love locks" was on bridges along the Great Glen in Scotland. Read that Paris was removing all those locks out of fear for the structural stability of bridges.
Not the fashion here in Montana, but you'll often see pairs of shoes tossed over telephone wires to commemorate something or other.