Profile pictures, I think, are virtually useless. Photos often provide security from the inherent anonymity that online conversations often entail. It is typically, for me, more comfortable to chat with somebody if I have an idea of what they look like. I don’t want to sound vain, but I have to because I am so very vain. I don’t like the insecurity of knowing that the person I’m talking to is hideous.
Despite the security that photos often provide, it is often a false sense of security. I have yet to go out on a date with somebody that looks at all like their profile photos. To remedy this, I believe that everybody on this site should submit their most unflattering photo of themselves for their profile picture. That way, there will never be disappointment. Your date will stun you every time with his/her beauty.
For example, if you are skinny, start eating foods that are terrible for you for about a month. Next, have someone take a photo of you. Post that photo as your profile picture. Then, begin a strict routine of diet and exercise for the next month. Finally, go out on a date. You have no idea how well it will go.