Incorrect footwear may be one of many factors, that leads to an increase in injury risk that otherwise could be avoided. These include (but not limited to) localised foot injuries (ie blisters, foot sprains) in addition to injuries further up the lower limb (shin pain, anterior knee pain) due to incorrectly loading these areas. Ensuring your specific foot posture is supported by your chosen shoe and taking the time to wear your shoes in are two ways risks can be reduced.
As mentioned previously, a running shoe simply is not designed to deal with the sudden movements and change of directions seen in the game of netball. Wearing anything other than a netball shoe on the court could potentially contribute to injury due to lack of stability, grip and overall protection.