think of your own topic..its actually easy
i have the same assignment for my term paper and im doing drug testing in the workplace..heres what i have..it should help
topic: 
                Drug Testing: Strict Policy over Strict Action
Thesis: 
                People have a right to both privacy and freedom from an unreasonable search; therefore, workplace drug testing should only exist if the employee has poor work performance and is suspected of drug use. Random testing should only be permitted in safety positions and drug testing should always be clearly stated in a policy written by your employer.