Meryl, I have a great direct report who spends a lot of time on the internet. We have guidelines about internet use and another director complained to me about how much she is on it. She gets her work done well, and volunteers for projects, so it's not a performance issue. She complains about being bored.
Response - Clearly the real issue is keeping her busy and using her talents, so while you could force her to follow the guidelines and you may need to, I suggest focus on redirecting her interests. Something like:
I can tell we're not using you to potential because you're over guidelines on internet use. Let's brainstorm projects for you until we come up with ideas that will keep you too busy to hang out there long.
It doesn't make sense to me to require you to follow the internet guidelines when you're getting all your work done, but I might have to. How can we resolve this? I have ideas, but I'd like to hear yours first.