I found this tidbit on the SysAdmin Reddit site:
One of my clients got tired of seeing Facebook, Twitter and other social sites up on the computers, despite his policy of computers being used for only work purposes (none of which require access to Facebook or similar sites at this company). So he had me block access to every social media site we could think of over the weekend.
Monday I got any number of calls complaining about it but when they found out the owner had me do it they quit bitching.
Except for one guy. The guy who is their best salesman but who is known throughout the company for having a temper and a somewhat hostile attitude (he has problems, wife has dumped him for cheating, money issues, etc). This gentleman was off Monday and Tuesday and was really, really unhappy he couldn’t access MySpace this morning. Luckily for him I happened to be in the building so he was able to approach me in the server/phone room regarding the matter.
When he found out I had blocked the social sites at the owner’s request he was (to put it mildly) extremely displeased. He first demanded that I make an exception for him and when I declined he quickly escalated to shouting at me.
Then he got between me and the door and pulled out a knife. Not some shitty pocketknife mind you, but one that looked like it could do some real damage. A “where the fuck could you hide a knife that size” kind of knife. Or at least it looked really big at the time. All I could think of was to push an office chair at him as hard as I could and get the hell out of the room. Not my most heroic moment but it worked.
I ran straight to the owner’s office, closed the door and babbled out what had just happened. He called 911, took measures to look for the guy along with some other folks but he had left the building. They locked down the building and put everyone in the break room or the conference room.
Police found the guy sitting in his car in the parking lot talking on the phone. He told them he had pulled the knife on me to get me to listen to him according to the officer who talked to me afterwards. They arrested him of course.
Before I left the owner had me disable the guy’s account and he was personally packing up the guy’s personal belongings. The owner is going to get a restraining order on the guy to keep him away from the company and tells me he’ll pay his attorney to get a restraining order to keep him away from me as well.
I’m not sure if the owner of the company will demand the guy gets prosecuted or not. I’m not going to unless the owner asks me to. It was scary as hell at the time but I don’t think it was personal so much as just him reaching his breaking point. Really I just don’t want to see the guy again. Owner thinks that the guy will probably leave town if the charges get dropped.
TL;DR: Brought an office chair to a knife fight, survived by running away.
Edited to remove potential inflammatory language.