Utilitarianism theory of ethics

Is utilitarianism theory of ethics popular? why or why not?

If one had a tendency to favor utilitarianism theory of ethics (The greatest good for the greatest number),  determine the following as ethical or unethical practices based on utilitarianism theories. Be sure to provide some citations as well with your descriptive responses:


        
Capital punishment
Company e-mail for personal use
Using the Company copy machine to print the E-text
Drug testing
Personal use of an company-issued cell phone