A cow-orker was put on a railroad bridge inspection team years ago - circa 2002. They were doing some high stuff and major river crossings, and the client's safety protocols kicked into high gear. He had to procure a safety harness for the work, and started blindly surfing the internet for one.
His first attempts resulted in a long list of gay bondage sites, and an almost immediate call from IT. It was the first time anyone in the office became aware that corporate had implemented content filters. And shit has rolled much further downhill since then.
I was working in a detective office about 5 years ago (I'm IT) and we ended up talking about popular movies. The account lead brought up Gayniggers From Outer Space the way that everybody does (What's that popular space movie from 1992?). I instantly said do not look that up at work to the group...he and I looked at each other and after a moment just started laughing. One of the detectives looked it up on his phone and started laughing. He thanked me.
They had a strict no naughty content policy in place. They would have gotten written up if they did that on the work PC.