do you care to comment on whether the caller, if they give their name, should expect retaliation?
In my experience I have not seen any retaliation against an employee who called in a concern. The concerns are generally routed to HR and Security depending on the content.
A UPS management person who would put themself in that position, would expose UPS to a lawsuit regarding harassment. Corporate or local attorneys may be involved with the response to the employee.
The answer is not reviewed with the employee at the UPS facility. The answer is generally sent to their home or a phone call.
The concerned employee is asked if they are satisfied with the response, if not, further research may be requested of UPS.
I have seen where employees have somewhat abused the hotline with bogus information, or just not being satisfied with the response.