Earlier quoted context omitted.
As a father of toddlers, (3 and 5), I despise the attitude of many bicyclists on sidewalks and public paths. You think you can't seriously hurt somebody on a bike? It depends on the someone you hit. Slow down when you see a pedestrian, as there might be others that you don't see. Don't ring your little bell at them as you whip past at 20mph, just slow down and show some common courtesy like a real human person.
This doesn't seem to be responsive. Your kids (or mine), no matter how heart-tugging a debate example they may be, will still be hurt less from a collision with a bicycle than the cyclist will be from a collision with my car. To argue otherwise, as Yver did above, is silly and counterproductive.
http://blogs.kqed.org/newsfix/2013/03/07/san-francisco-bicyc...
http://dcist.com/2012/06/woman_dies_after_being_hit_by_cycli...