|They could but likely your administrator doesn't bother since they'll keep a log of every website you visit, including any proxy websites. |
Just so you know. If you have such restrictions in place, circumventing them is likely to get you fired when you get caught. You'll notcie I said when and not if. That's because if they put restrictions in place, they also monitor for people trying to bypass them.
Is hanging out on facebook more important than your job? If so, then I suggest you quit and get another one. It would save you getting fired and that's a little tough to explain when looking for another job. In fact, it's likely to prevent you from getting a job since everybody who's smart contacts previous places of employment. When a prospective employer hears you'd rather play around on facebook than do your work, well, you can do that math I'm quite sure.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.