No I find an image online, and alter it with a program that I spent hundreds of hours creating that allows me to manipulate photos as well as many other things then I submit it with the description "Altered picture with my program". Which I believe is a fairly accurate statement.
Also grain filters usually just delete random pixels and turn them white leaving the others untouched. While my program alters every pixel, leaving that pixel one of two colors based on the density of the shade of itself and the surrounding pixels. Also I think the images you are thinking of work on a gray scale ranging in 266 colors from white to black, while mine is either white or black.