I have three great porn at work stories. I might've told these before so apologies upfront:
1. At a small private (at the time) software company that was highly specialized (therefore programmers were very rare), the CEO tasked the CIO to install some remote desktop software so they could help troubleshoot problems. The CIO had a small launch meeting with the CEO and a few members to show off the software and said, "Hey, let's see what Bill (head of development) is doing." He launches the remote desktop session and brings up Bill's screen which was currently full of lesbian porn. I laughed and laughed but no one else thought it was funny.
2. When you do a presentation at a large venue there's a walk through the day before so that the venue can prove to you that everything works. We were part of a congolmerate of presenting companies that were doing our walk through. One part of the walkthrough was verifying their movie screen-sized projectors worked with our laptops. We all took our laptops and plugged them in and verified that we were good. When we got to Sun the guy that was there wasn't the one presenting so he ran and just got the sales guy that would be presenting laptop from the back stage and plugged it in. Suddenly 30 feet of a blonde gagging on a cock was emblazoned on the screen. The guy from Sun just said, "Yup, that works." and sheepishly reached over and unplugged it. No one ever brought it up. Again I laughed and laughed.
2. At a large company that styled itself as a very conservative joint where they'd be more interested in giving you hugs than actually doing work a Sales guy kept missing submitting his forecast because his forecasting software wasn't working. He called my team and one of my team members a lanky shy white called him back and emailed him several times and never got a reply. The sales guy kept missing submitting his forecast and kept blaming my team member, since my team member was so timid he just kept his mouth shut and kept emailing the guy. The sales VP eventually got furious and took the sales guy's laptop to the CIO and essentially yelled at the CIO that they weren't going to be making their sales numbers because the IT team was incompetent. Well, unlike wealth, that shit trickled down incredibly quickly down to me and my team. My team member took the laptop, dropped everything and promptly fixed the issue (which took like 5 minutes). But he noticed some strange icons on the desktop. He opened them up and found a ton of porn, which was hugely against company policy because the company was hella conservative. About 4 hours later, my manager, the CIO, the VP of sales stomp into our cube farm and demand to know where the laptop was. My team member said "It's with network security. Turns out there was about a ton of porn on the desktop and we need to make sure it doesn't have a virus". The VP turned to the sales guys fuming. Then my team member hands a stack of papers to the VP of Sales and said "Oh, and here's the 9 emails I sent to your employee asking for him to contact me about this issue. These go back 2 months and I never got a reply." The VP took the print outs, looked through them, turned to the sales guy and said, "You. Come with me." And stormed off with a very red faced sales guy behind him. My team member then turned my boss and the CIO and said "Got anyone else that needs help?" Dude was timid as hell that whole time but man he was a badass that day. Also I laughed and laughed.