Lost Shoe Network

What is it with the single shoes by the side of the road? Were they thrown out? Accidentally dropped as someone dangled a foot out the window?
I have seen plenty of single shoes, but have never once seen how they got there.
They have a lost look, a lonely look. There is something particularly sad about a child's shoe. Was it thrown out in defiance? During a fight with a sibling?
I think we should form a Lost Shoe Network. As lonely shoes are spotted, a picture with directions on where the shoe is located could be posted. Unite Separated Pairs!