Blurring out faces in images

I used Gimp to blur out some of the faces in this picture. This tool can be helpful when posting pictures on a website and someone doesn't want their picture to be on the website, so all you have to do it blur it out. What I did to blur out the others faces was take the circle tool and put it around the face that I wanted to blur and then I went up to the filter button and clicked on the Gaussian Blur and then picked how much I wanted to blur the face.