Revenge is dangerous. It can turn a good person bad, and that is not easy to come back from. This list of AskReddit stories, while not all about revenge, definitely deal with bad people, or at least people who have done bad things. The best I can say is that some of them at least feel sorry about the evil things they did. Not all of them though – and that’s a little scary. You’ll see:

1. Trading

I took a girl’s midterm (it was a large class) in exchange for a BJ. I got one for taking it, and another after she got an A on it.

2. “Mass confusion followed”

Me and some friend took fishing line to school one day in high school. We got into groups of two. One person held the base and the other took the loose end. We stood in the hall and “weaved” in and out of people. Thus creating a massive “web” of sorts. Mass confused followed and it was pretty damn cool.

As fun as it sounds, we ended up cutting a lot of people with it and caused a older teacher to fall and break a wrist. i know of lots of students that still have scars from it.

Somehow, it never got back to us and they are still wondering who done it. It bothers me to this day.

P.S. it still was pretty damn cool.

3. Gross vs. Gross

Back in college, my roommate was gross, she used to not take a shower for over a week, she would wear the same pair of trousers for a whole month, she would leave all her dirty (DIRRRTY) clothes on top of my freshly washed towels, she used to smoke in our tiny bathroom, and a long gross etcetera.

She used hair-removing cream to get rid of the hair in her armpits (which is totally fine) but afterwards she wouldn’t clean the sink or remove the cream bits filled up with armpit hair. Day after day, the same cream bits were there, I used to have nightmares when I thought of how gross those were. Every time I needed to brush my teeth, I felt like throwing up. After warning her kindly twice, and seeing however that she still wouldn’t do anything about it, one day I decided I would, from that moment on, clean it myself. Am I not a dream roommate? I used to leave the sink spotless, her toothbrush did the trick very well.

I used again this cleaning method when my brother kept sprinkling the toilet bowl instead of leaving it up while taking a piss. He has damn good teeth, though.

4. Medical Malpractice 

Last year, I started my 4th year of med school and got transferred to a public hospital to finish my studies, near the surrounding areas of the hospital there is a slum where thieves hide. One morning going to class I got mugged at gunpoint by two guys, they took my backpack, phone, wallet and shoes, in my backpack I had a stethoscope that was quite expensive and that my dad gave to me as a gift when I started to go to the hospital, they took it just because they wanted to screw me as I told them that I only had that and a notepad in there, I was really pissed off at the time but I could do nothing if I wanted to live.

After some months I started to do assist on the ER and one night one of the thieves came in with a laceration on his cheeks, now I’ve got to say that I live in South America and it’s a common rule that at night medics go to sleep and when a patient appears on the ER we have to evaluate them and then call the medic, which isn’t legal at all. As I was alone in the ER at that time, nurses were on their station, and I wanted to do some harm to this guy I put my act as a medic and started to suture him, which is something that I know how to do but it’ll leave a scar as I’m not very good at it yet, but leaving a scar wasn’t good enough for that scum, I wanted him to suffer so first of all I diluted the lidocaine with saline solution and applied it in a way that I was going to hurt him so I did my best to suture him without cleaning the wound, using not sterile gloves and touching all the suture materials with my bare hands before using them, when I was done with the suture I didn’t even register him on the books and send him off.

One week later I heard that the same guy came back with a nasty infection that required antibiotics and should have left him with a nice crater on his face but as he didn’t come back the same day that I’m doing my practices I don’t know what happened to him.

5. You’re a dick. 

The day after “Harry Potter and the Half Blood Prince” came out I played counter strike all day with the handle SNAPE KILLS DUMBLEDORE.

6. Little Hellion 

When I was in preschool, I apparently put glue on the entire class’s seats. Didn’t get to go to recess, stayed in and broke crayons in half and threw them at the flagpole.

7. Kids…

When I was 11, I gave a kid (he was 9) a pretzel stick I had stuck in my cat’s litter box.

8. Oreo Bandit

This rather large kid had a habit of bullying me out of my Oreo cookies at lunch everyday. When you’re in second grade, this begins to take a toll on you. Finally, I went to my dad about it and he concocted quite the plan, halfway inspired by something that happened in a children’s book he read to me at the time. He took one of the cookies, hollowed out the center of the cream , and put a ton of Tabasco sauce in there. When he resealed it, he left cream on the outer edges so it still looked normal. Needless to say, I was incredibly excited about what was going to happen the next day at lunch.

The next day, he actually wasn’t bullying me out of the cookies…he must’ve had a change of heart for once. But A.) I wasn’t going to eat that shit and B.) I still wanted to discourage him from ever stealing them again. So without provocation, I took the bag of Oreos and offered them up to him for free, on my own behalf. Delighted, he took a bite of the atomic one and immediately started coughing to the point where he was pseudo-choking. He ran to the bathroom, vomited (I believe), and I didn’t see him for the rest of the day.

He never stole my cookies again…I still smile about it to this day.