factors the courts consider when reviewing an employer’s intrusion of employee rights using electronic surveillance?

What are the two (2) main factors the courts consider when reviewing an employer’s intrusion of employee rights using electronic surveillance?
Answer
Obnoxiousness of means and reason for intrusion.
Obnoxiousness of means and type of intrusion.
Violation of tenth amendment and frequency of intrusive conduct.
Obnoxiousness of supervisors and whether valid evidence is present.