Posting normal pictures and typing the caption above/below was the original intent, but it might be funnier to PS it into the image itself. Thoughts?
Thats fine, but as olavf suggested, photoshopping must be limited to only one of the three options. For that matter, any captions in the posted should also be limited to one of the three. The point of the event is to focus on the comedy of the picture, not to wax eloquent. OBO notations are also ok.