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.
Your lack of desire to take seriously your responsibilities to those you share the sidewalk with is a problem for me. You want to be on the sidewalk so you'll be safe, while at the same time, refusing to acknowledge any risk you're imposing on others. That doesn't fly with me. Slow it down, sporty.
http://blogs.kqed.org/newsfix/2013/03/07/san-francisco-bicyc...
http://dcist.com/2012/06/woman_dies_after_being_hit_by_cycli...
Clearly this is an issue of religion. If so, then just declare your side, sharpen your pitchfork and be done with it. But arguing as this thread does, that riding on the sidewalk for safety is "equally unsafe" needs to be done with evidence. It's certainly not true that the collisions are independently more dangerous. Maybe you could argue that there would be more of them or something.
>>Fortunately, most sidewalks where I live are sparsely populated, and I make sure to slow down to walking speed or dismount completely when going through areas with lots of pedestrians.