One last question. What about losing precious work hours as a result of email abuse? Isn’t it theft?
Allow me to expand a bit on what I think Jim is trying to convey.
Two Sundays ago at my church, there appeared two signs in the foyer (open hall area right outside the main worship area) that in big letters said QUIET! WORSHIP IN PROGRESS!!
What do you think those signs accomplish? OK, maybe one or two won't talk. But for the most part, those that talked before will still talk. Furthermore, instead of having a sign that says (or implies) Welcome! Thank you for coming here! We're blessed to have you... etc.; they see that sign. It irritated me so bad I talked louder. I know... not very christian, but I do tire of think-tank, micromanagement decisions at church.

Several people commented on the negative overtone of the sign, as opposed to feeling it was a well thought out approach.
Yes, there is always going to be an element of abuse at work, stemming from Equity Theory, poor organizational skills, problems/stress at home, job dissatisfaction, etc. But there is that element of significant abuse that needs to be dealt with. Those require disciplinary action, which eliminates that problem, and provides strong motivation for others not to do the same things.