first of all, all this does is create work for the admin, lets consider it job security if anything.
If the 'porn' is not of an illegal nature, gee guess what? This guy is as normal as BIILLIONS around the world, otherwise the porn indeutry would be an underground venture and not one of the largest revenue streams known to man.
You will NEVER EVER be able to stop people from surfing porn with ANY stretch of your imagination. They closed down hen houses, the men moved to the next state. They shut down ONE porn site, 15 more appear. It's reality, until people can get a grip on reality they will fight against reality all thier lives, a truly uphill struggle.
so lets say you plot and twist and get the guy in a whole bunch of mess, his wife may not care about porn but his MISTRESS might, you bark up the wrong tree and you're fired for slander.
he may not be surfing anything other than legitimate adult paysites, again you call in the authorities you will be fired for slander.
You complain to HIS boss, who may also be surfing porn, you are fired for slander (lets see just who has the pull, the $65,000/yr netadmin or $200,000/yr CEO) again fired for slander.
What I don't understand is why all these former nerds hae become todays PC police. Playboys were in desks and staff rooms long before computers or the internet came along. if th eboss is a guy, you won't gain too much sympathy that's for sure.
Company policy? Only applies to the little people. Question it, you'll soon find out.
Company expense? You boss will fork out YOUR $65,00/yr to anyone in a heartbeat that will just do the job and repair/clean up the crap.
your boss will most likely not be willing to fire a $200,000 emploeyee because a netadmin is complaining of costs or extra work. Sorry, policy and theory are one thing, reality is another.
Why do you think it hasn't gone anywhere already? If it really WAS an issue of concern it would be addressed.
I had a boss who didn't gie a sh*t what people thought of his behaviour. he would outright tell the secretary she was a dumb bit*h and she needed to get laid. many had TRIEd to sue him, most failed. A FEW got a few bucks, most lost thier legal fees to poor lawyers, but they are out of work and he continues to run his business even more succesfully than ever.
All you are doing is being the squeaky wheel, but in this case it's cheaper to replace you with a new wheel than to grease you.
Focus on people that the boss cares about abusing his systems, it is't going to be the CEO.
I am sure he is more concerned about staff visiting Monster.com than his CEO surfing even the most disgusting and insecure porn on the web.
These policies are to stop "cheapo peon" employees from costing him money, I'm sure he pisses away thousands entertaining his partners and buying drinks and rounds of golf for the upper management.