Really? There's enough room for everyone to use these things. I use the sidewalk sometimes even when there is a bike lane. It is just safer. Sounds like bike rage. People sometimes get mad at me on the side walk. Kind of depends upon the city. Did you ever ride in the middle of the street? I mean it's a big planet. This to me is kind of small box world thinking. People are in their own little worlds when they bike or jog. Can't expect everyone to be paying attention.