I think the pictures are fun. These guys are showing some original material (i.e. bits of themselves) and artistic/photographic talent (or lack of it). It's so much more interesting than stuff copied from some anonymous porn site.
Of the ones I've seen so far this one is one of the technically best pictures:
[
www.plus613.com]
1. He has a neutral background (a bathroom wall).
2. There is some context (knees-to-shoulders visible).
3. The picture is sharp and with good light. He probably had somebody else hold the camera (a good idea, IMO).
4. He's not trying to puff himself up and look big. The ones who do that make me think that they probably feel quite small...
5. He looks comfortable (he's in an environment where it makes sense to be naked).