The internet is cool and all, but it is traceable by certain people, especially at a company. I keep my questionable internet viewing to home use only where the only person that knows what I do is some random guy I will hopefully never meet. But, there are always exceptions. One of my friends knows some guy who looks at porn sites while working about every day...the problem was that one of the sites had naked men. He is known as "Porn Boy" there, but I am sure they could have thought up something worse.
Great blackmail tactic, if it ever actually exsited.