Cyclists do not use sidewalks. But, some people who bought bicycles do. Just like some people who run do it on sidewalks where people walk and push strollers, or on the wrong side of a busy roadway where they can be seen and admired for the grimace on their face.
Now, I'll enlighten you about cyclists and pedestrians.
Hunter College (New York City) reviewed all New York state hospital records for 2007-2011.
Hospital admissions averaged 1000 pedestrians per year who were injured by a cyclist.
Now, Google “Pedestrians Killed By Cyclists.”
On the first page you will find news reports about pedestrians killed by cyclists in San Francisco, Queens, Austin, and Portland, Oregon.
By the way, Hunter College calls them “cyclists,” too.