It can be done and you need to know someone in the IT desktop support more like IT server group. But I think one of your network engineers who runs and monitor the BlueCoat Web Security box has a good list of what sites to be blocked. You should be careful not to access these sites while being block as you'll get put on a list. You might get told to see your manager. Don't let that happen. Just do your work and then go home and get on the internet and go check those sites of interest you had wanted to do at work so bady! This way no need to worry about your job state.