How should and shall non-driven idler rollers be guarded?

Machines with return idler rollers are required to be guarded only when they are powered and there is accessibility by the employees. The argument can be made that just because a roller isn’t driven, the risk is still present with wrap and pull-in points, as well as entanglement due to being driven by conveyor belts or momentum of product weight. The idea non-driven rollers can be stopped by hand isn’t a best practice for operators to test or find out. The cost of covers, shields, caps, or guards should be added to help elevate the safety of the work environment.

OSHA 1910.219