[alistairSH]

Largely because bikes and pedestrians are forced to mix in most areas in the US.

Provide reasonable bicycle infrastructure and the problem starts to resolve itself.

A few local examples... the main road outside my subdivision has a bike lane, but it ends a few blocks before the school, starts again, then stops a few blocks before the shopping center. So, bikes have to move to the sidewalk and interact with pedestrians, dog walkers, children (or enter a traffic lane). Terrible design.

That shopping center has a single bike rack at one end. To get from that rack to the coffee shop on the other side requires a long walk through the shopping center OR walking across a large parking lot. So, people just leave their bikes leaning against the wall outside the coffee shop. Terrible design.