Final answer:
The main reason why off-site drug testing is ideal is to protect employees' confidentiality, which helps maintain private health information and can be more defensible in litigation.
Step-by-step explanation:
The main reason why off-site drug testing is considered ideal is because it protects employees' confidentiality. By conducting drug tests away from the workplace, the possibility of other employees or supervisors learning about one's test results is minimized, which can help maintain a sense of privacy and respect for the individual's confidential medical information. Moreover, when confidentiality is preserved, it lessens the potential for tension between employees and management, which could lead to threats of lawsuits.
Although off-site drug testing may help create a more comfortable situation for employees, which can in turn make them feel safer, the primary concern is always to maintain the confidentiality of their personal information. Furthermore, conducting drug tests through external, certified labs can also be more defensible in litigation, should legal challenges arise concerning the testing methods or the results.