Been in c-level management for many different types of companies. Simple - your computers, infrastructure, and salaries. No personal internet or email during work, breaks/lunch are fine, should be in the personnel manuals. Have IT shut it down as you indicated above and hold people accountable. Side note, I never hunted for info but it is nice to learn of looming personnel issues when employees are looking. Loyalty goes both ways. I never let on that I know that someone is looking, but it is filed away. I will and have gone to the moon and back for an employee, and they know it, but if they are or have a habit of always looking - then I am looking to replace them with someone I have confidence in and someone I do not need to be concerned about. I want to avoid walking in one morning and have them quit that day since it tends to happen at the worst of times. They look, then I look. My 2 cents.
