Arlington Heights and the Lake Arlington trail has nothing on Palatine when it comes to the potential for bike/pedestrian accidents.
Just take a walk through the Margreth Riemer Reservoir between 5 and 7 p.m. most weekdays. There you'll see six, eight, 10 -- maybe as many as 12 -- bike riders in a tight pack whizzing along the pedestrian path as well as the Disc Golf Course and anywhere else they please.
Parents with children, people with pets, folks with walking aids and anyone else who gets in the way beware. They yield to no one. And make no apologies about it. I've seen them blow dangerously close to a fellow with a walker, eight of them in a row, with no room for error. Soon, if not already, someone is going to get hurt.
I've tried to talk to them, to no avail. They now get as close to me as possible when passing. As far as I'm aware this facility is not set up for the this function and things can only end badly. These are not kids -- they are adults who should know better or at least care.