So this happened last year in World History class.
We had a substitute teacher one day (a really old guy who looked like Chicken Little's granddad). On that day we were given a group assignment where we had to pair up with a classmate and review notes or read or something like that.
As usual I was the last to be picked and I ended up getting paired with a somewhat mentally deranged kid in our class named Andrew. He's a guy who gets into a lot of trouble at school with teacher defiance and cheating on his tests and stuff. He looked like the kind of guys you see in police mugshots for child enthusiasm arrests.
Anyways I had to work with him, and tried to start idle conversation with him so that the assignment wouldn't be so uncomfortable. I said "how've you been, bro?" and apparently he must be really touchy or sensitive or something because next thing I knew, he said he would "kick my ass" if I called him bro again. Not thinking, I replied "ok sorry bro" (i didn't mean to call him bro again, I accidentally spoke before I thought).
He got up out of his chair and stood over my shoulder breathing down my neck glaring at me, and the other kids in the class suddenly noticed and reacted with an "oh crap" reaction, backing off and looking at what was happening.
Suddenly the substitute teacher saw what was happening and sent Andrew and I to the dean, even though I hadn't done anything wrong.
Thankfully I didn't get in trouble in the end though. My dean (he handles students with last names of letters K through R) is a cool guy who is good at sorting out misunderstandings, and he was already well aware that Andrew is a habitually problematic student (he's been suspended several times before), so he let me go but had Andrew stay with him for the rest of the period to "have a talk".
At my school there's lots of that type of kids who are the real liberal-whiner type who get "offended" about everything and get all pissy-pantsed about anyone who doesn't have the same political views as them or jokes about something that plays off a totally bogus stereotype.
Last week, in my Psychology class, I told a joke that I had heard in a skype chat with some of my friends from Starmade.
"I wish my grass was emo, so it would cut itself"
Suddenly I get a massive lashout from a group of whining girls in the back who accuse me of "hating emo people" and "stereotyping all emo people".
The teacher condemned me as "having no filter" and said if I told a joke like that again I'd get sent to the dean.
People these days don't know how to take a joke. A JOKE IS NOT MEANT TO BE TAKEN SERIOUSLY.