Every staff member should be able to work in a safe environment and be able to return home from work alive and well. Workers have the right to stop work if they form the genuine view that the work is unsafe. If a Library checkout machine suddenly started spouting flames, the library staff would not be expected to just keep working! They would stop working until the hazard had been removed or sufficient protection had been put in place to prevent the risk of injury. Some unsafe work will be less obvious, but the threat may be just as real.