Schools beg cyclists: SLOW DOWN! First week of school: School Zone speed limits in effect! Children crossing. (You're wearing a helmet, they aren't.)
Observe bike lane speed limit because "Speed Kills". Be aware, take your earphones out, look around you.
Concerned parents are observed driving kids to school. "For a pedestrian, walking across bike lanes is hazardous", they note. Slow-driving parents prefer to keep their kids safe in cars. "A speeding bike is lethal," they point out.