A large group of Swedish teens formed an unruly mob and then stormed a high school and mall... all over an Instagram account, according to a report from The Local. The account gained more than 7,000 followers before it was shut down, and the enraged teenagers organized via a Facebook event hoping to locate and assault the alleged creator of the account.

The Instagram account started when a user put out a call for tips on "sluts" in the area, and promised to keep tipsters anonymous. The account eventually collected over 200 pictures of kids between 13 and 14 years old, many of them with names and alleged sexual activities attached, according to The Local. When the Instagram account was shut down, the teens involved took to a Facebook page to point fingers and verbally assault each other.

Another Facebook page claimed to name the 17-year old girl who started the Instagram account and called for the other teens involved to meet at her high school to beat her up. Teens who met at the school began kicking down lampposts, jumping on cars, and throwing bottles and rocks at police officers who had collected to try to contain the scene.

The event is reminiscent of ones that cropped up around Snapchat, a picture-messaging app where messages self-destruct after a number of seconds (users have opportunistically put this to work as a sexting medium). But the iPhone can still, obviously, take screenshots within the app, leading to collections of the messages, as on the Tumblr Snapchat Sluts (NSFW). No rioting has resulted from Snapchat Sluts because, according to its curator, all of the photos were submitted willingly by their subjects. Welp.

Update: As commenters have pointed out, the photos posted to Instagram were not themselves naked images, but rather pictures of teenagers with names and alleged performed sexual activities attached.