You know how you form a mental image of the other forum members after reading their posts day after day? Sometimes you do catch a glimpse of others and you think: "Wow, he/she doesn't look anything like I pictured!"
Is it better that we not know what the others look like? Part of the beauty of the Internet is that everyone is equal, no judging people on looks or age, only on what comes out of their brain (in most cases). Would having a mug shot database violate that basic principal of anonymity that makes many want to participate?
Personally I don't care, since I am extremely good looking. Yes, my wife tells me so, so I know it is true. Picture below.
Seriously, I'm not gonna be first, but I'll be second or third if someone else is brave enough, or foolish enough.