Every so often, this particular topic comes up.
Recently, I was accused of "hiding" because I don't have a picture of myself posted. The person making that accusation was making a whole lot of false assumptions based on nothing more than an avatar.
I'm not here for dating, and I have never liked having my picture taken.
I do not feel it's necessary to post one's picture on the internet, or anywhere else, if one doesn't wish to.
If I were on this site for dating, that would be a completely different story, but since I never have been,
I don't believe I "have" to put up my picture.
I don't think any of us are obligated to share our pictures.