I am signed up on a few career networking sites (like LinkedIn), and I often get sent reminders to add a photo to my profile, and "Here's an article [written by us] about why having a photo is great!"
I am in my mid-20s and look even younger, so I have always thought that having a photo would be a detriment for me. I don't want people to assume I am inexperienced simply because I may appear young. I can think of a number of other reasons why people would not want to post a photo for fear of being misjudged as well (age, race, gender, style choices, etc). I understand that there are things I can do to make myself look older and more professional, but not everyone has that option.
How valuable is it to include a photo on networking sites, and how can I decide whether having one is right for me?