Forever and forever and forever .............
This is a classic example of the Streisand effect, in which attempts to remove things from the Web cause them to spread (named for the case where Barbra Striesand's lawyers attempted in vain to get a photo of her house removed from the Web). But this case is different, because the graphic was posted by the same people who were trying to remove it. So learn. You can't take something off the Internet, even if you put it there. And attempts to do so only make it worse.
http://www.crainsnewyork.com/article/20110113/FREE/110119917#