Well, I think it is not a good criteria, I am guessing INFPs in more familiar social networks, such as facebook do have more pictures and are more comfortable being pictured compared to INFJs. Here, I am not sure, I sure don't like the fact that this site is google searchable so I will delete any pictures I put on here and keep them here for only a short time. I think we are just more out there when we are in a more familiar/secure environment. Well of course, both INFPs and INFJs are still on the scale of sharing less pictures of themselves.