Twitter is a great tool for learning about events happening in your city. For example, the Ben Jerry’s ice cream food truck can tweet its location, and, within minutes, will have swarms of people ready to eat their delicious treats. It’s nice to know about things you’d otherwise be in the dark about, but you have to realize that every single person following the Ben Jerry’s on Twitter also has the “inside scoop.” This can end baldy when you turn the corner to where the food truck is located and see a line of 100 people who beat you to the punch.

Now, let’s take the Ben Jerry’s truck scenario and magnify that. DJ Kaskade, a very popular DJ with over 94,000 followers, tweeted yesterday about a block party being held outside of Grauman’s Chinese Theatre in Los Angeles. The theater was hosting the L.A. premiere of Electric Daisy Carnival Experience, a documentary about the annual Electric Daisy Carnival, a giant rave meant to celebrate the still-thriving electronic dance music and rave community. The 2011 event held in Las Vegas over three days had about 215,000 people in attendance, so you can get an idea of just how popular the EDC is. However, the block party almost turned into an out-of-control riot after Kaskade, one of the stars in the documentary, tweeted the plans of the impromptu block party.

Lo and behold, over 2,000 people showed up and crowded the street outside the theater before Kaskade could even get there. The tweet that started the whole thing said the time, date and place of the block party, followed by: “ME+BIG SPEAKERS+MUSIC=BLOCK PARTY!!! RT!” He also tweeted “let’s see if the magic of social networking will work today.” The power of social networking definitely did work, but went above and beyond what Kaskade had expected.

He called the horde of people a “#flashcrowd,” and while he was still on his way to the event he tweeted that “the man (is) trying to shut us down.” The L.A. police arrived and tried to clear the street. Law enforcement shot beanbags at the crowd and tried to push them away, which then sparked the crowd to start throwing objects, vandalize cars, and even enact the art of planking.

Kaskade’s tweets quickly changed from happy to panic as he tweeted for everyone to “please relax” as he was very concerned for everyone’s safety. He tweeted that the party had been shut down, and then tweeted that everyone had to go home immediately as he didn’t want this to reflect badly on “EDM” (electronic dance music).

Although the Electric Daisy Carnival is known for ending in hundreds of injuries and some deaths, no one was reportedly hurt, although several people were arrested, and a number of police cars were damaged.

We’ve seen social media turn fun events wrong in the past when one teen accidentally made her Sweet 16 birthday party open on Facebook and had 200,000 people RSVP for it. That party was quickly canceled before the party day, but one girl’s Sweet 16 saw 1,500 people show up because of a lack of Facebook privacy.

It seems that social media is a very delicate tool that, when put into the wrong hands, can result in hordes of people showing up to events. The lesson here: think twice before you tweet. The better solution, instead of tweeting the block party to 94,000 people, would have been to do it the old school way: call up a few of your friends and have them bring a few of their friends. A couple hundred people is much more manageable than a couple thousand.

You can see some of the footage of the “block party” below.

via AV Club