As a knowledge worker in the public service there is nothing more frustrating than being denied access to the knowledge you need to do your job. When it happens repeatedly over the course of a few hours it moves from slightly aggravating to completely demotivating.
Here is a quick comic I threw together using bitstrips about the 5 stages of internet access blocking at the workplace.
In a somewhat serendipitous manner, my friend Mark just created an awesome site called IsItSafe.ca.
The site itself specializes in URL/domain mini-Risk Assessments; read more about Mark's awesome efforts right here.