Flash mobs

Flash mobs are just another way to express ones self through dance, but does the unexpected aspect of it make it any greater than if one were to be going to a ballet knowingly getting ready to see a performance?  I feel like it would definitely bring a whole different feel to it.  You aren't ready for it, it just starts happening around you and can really draw you in.  It seemed like it was just supposed to be a positive event to help lift the moods of people in their everyday lives.  It has now been banned in some places and some places work to keep them from following through.  They are able to use an excuse as the event didn't have a permit for taking place in a public area or the endangerment of people.  I can understand that having a sudden rush of people to a place could be a safety hazard, but it is not meant to be violent.  I have never read anything about a flash mob turning ugly and people getting trampled on or any form of injury occurring from it.  Another bad outcome of flash mobs is that people have taken it to actually be something bad.  They are doing robberies as a "flash mob" or other crimes so the word "flash mob" has taken on a negative vibe, but those crimes are nothing to do with what art is supposed to be taking place with flash mob in reality.  It is upsetting to see such a creative and positive idea being taken and having people try to turn it into such an ugly thing.  I have such respect for people who do them because it does take a lot of organization and keeping it hidden and having people not come in just a flood, but trickling a few here and there.  It is truly just a magnificent thing to watch unfold in front of your eyes.

http://youtu.be/bQLCZOG202k

http://www.essential-humanities.net/western-art/painting/modern/