First, I don't understand why you'd want the picture of some actual living person on your target. A silhouette is more than enough to get the job done. Maybe some of you just have some sort of repressed rage that needs venting on a specific person?!?
Second, I would definitely NOT want to use an image of our president. That is just asking for trouble, plain and simple.
Third, how can you consider it to be cost effective to print a target on your home printer? If you print it big enough with full color, you are going to spend about fifty cents a target, maybe more (depending on your printer).
Last gun show I went to , they had a guy selling targets that cheap that were bigger that what I could do at home. Plus, I don't have to waste the time actually printing them out...