Why Should We All Have an Idea Blog?

In class we have gone over the reasons why each and every one of us should have an idea blog, but I found a real story which shows a practical reason for keeping a blog.
Student James Karl Buck helped free himself from an Egyptian jail with a one-word blog post from his cell phone. Buck was covering an anti-government protest in Egypt when he and his translator were arrested. Using his cell phone Bunk updated his status on his blog simply typing "arrested." Because of his blog Bunk was able to get out of jail with the help from his friends on the outside. Buck's translator unfortunately had no cell phone or blog to contact his family with. Buck tried to get help for his translator but the two were separated. The government is saying his translator was released from jail on the 13th of April; sadly his family has heard no word from him and believes he is still in jail somewhere.
It's a bitter sweet tale for Buck his blog saved him, but could not save his friend and translator. If this story does not show the creative reasons for keeping a blog I think it shows the practical.