I see both sides of this almost daily.  i try to ride ~150 km a week so i spend a fair amount of time on my bike.  I've been on roads where drivers pass me so close i can touch them and they make zero attempt to even slow down.  I've been hit by two cars, both making right hand turns without looking and turned on top of me.  I've had people walking on the trails and cross right in front of me without bothering to look both ways first and i am doing 20km/h.  Flip side, i have been passed on those 20km/h zones by others who think it is their personal "time trial"..  I've also seen people walking 5 deep and blocking the entire pathway even thought it is marked dual use (walking/cycling).