You also might want to look at the lighting on those bike being stopped and how the cyclist are riding. Cops in my neighborhood (just outside of Cleveland) are usually concerned about stolen bikes when they see a rider after dark. If the rider is riding with lights and mostly following traffic laws it is unlikely the bike is stolen, while a youth riding haphazardly without lights has a higher probability. Given that the small city I live in recovers a couple hundred stolen bikes a year, they have some experience with recognizing potential problems. I guessing if you are cycling reasonably safe they will ignore drunken riding.

Craig