[quacksilver]

I personally would prefer a randomly selected load of strangers to vote on, say, my best corporate headshot to display to the general public rather than my friends who are a small and biased group.

I guess the people that self-select to go on a photo ranking site may not be representative of the general public, though are probably better than the (all male) 10ish engineers and 3 accountants that I socialize with on a regular basis.