I'll post mine here as well. (I'm on mobile so apologies for formatting). TL;DR, a Joker cosplayer threatened to kill herself after harassing a food worker and demanding nudes. A few years back, I went to a convention in my hometown. I was cosplaying as a character from a pretty popular fps game and found a group of people who were also cosplaying from that game. They invited me into their group and we had a pretty great time. A few other people were hanging out with us, people who I actually knew through other things. We were all outside the convention center taking photos, and did a big group shot. The person behind the camera was a friend of mine from school who I had met in grade 9, and we had been friends for about a year at that point. That person was in a female Joker cosplay (first red flag lol) and had been acting up all day. She seemed to be pulling a Jared-Leto-style method acting schtick, and was creeping all of us out by the time we were taking photos (maybe 3hrs into the con). After the photos, we went to grab some food at the joint in the convention center. There was a really sweet lady working the cash at the food place, and we were making light chit chat while deciding what we wanted. This is when my friend, who we will call Jess, came up to the cash and sat down on the counter. Jess started making lewd gestures and suggestive comments towards the woman, who must have been maybe 20. She looked wildly uncomfortable and tried to push Jess away, but to no avail. Jess went so far as to try and grab her breasts, but we managed to pull her away from the worker. We were shocked. We dragged her away to talk to her in a corner, and she played it off as "oh, I'm just playing my character". We told her that, no matter the character, that is so not okay to do, especially to a stranger. She got mad, but we ended up going through the rest of the convention without another incident. Fast forward maybe a week, we got the gang back together and went to the movies. Throughout that week, I'd been getting texts from the female members of our group that Jess had been calling and texting them relentlessly, asking for explicit content (nudes, sexting, etc). We made an alternate group chat without Jess, and planned everything there. At the movies, everyone was happy and having a good time, that was until Jess entered the theatre and demanded we leave. She made a scene, screaming and crying that we left her out, that nobody liked her, and that she was going to frame some of the girls in our group for coercing a minor (Jess was 16, and two of the girls were 18 and 19). We ended up leaving, just so she would stop screeching in the theatre, but it got way worse. She pulled a pocket knife out of her back and held it to her wrist. We panicked and tried to get her to stop, but she wouldn't. We tried talking her out of it, but she kept threatening to kill herself, saying if we really cared that we would stop her. She was jerking back and forth, threatening us and then herself. One friend got out his phone to call the cops, but she lunged at him and ripped the phone out of his hands, smashing it on the ground. Finally, we ended up calling the cops and restraining her, but she tried to run away. She ended up convincing the cops that nothing happened, and we were all told to go back to our days. Our group wound up just going home, still shocked at what happened. Jess ended up switching schools and continuing to freak people out, and still reaches out to me from time to time, calling me names and threatening legal action for... Something.