[Skidy]

In my eyes its just making a directory with all permissions on it?

[Scy7e]

1) It allows me to browse your directory trees and look for specific files. Not the worst thing in the world as it won't let me see their contents, but you still don't want this
2) I can fill your drive with tons of unnecessary directories
3) There's hardly ever a need to make a directory world-writable

[Sakuto]

https://www.spiralscripts.co.uk/Blog/why...-risk.html
http://www.sitepoint.com/forums/showthre...urity-risk
http://stackoverflow.com/questions/23386...-dangerous