Don't give into public pressure if you don't feel like it. You owe people of these forums nothing, and if you'd want, you could let them forever in the shadows of doubt. It's never a good idea to become one of their puppets who obeys what the crowd tells you to. You're a prolific personality and so a lot is at stake, and the nervousness is understandable.
A lot of people judge too shallowly with pictures... so if you doubt, for something as ancillary and unimportant as volatile online communities, maybe it'd be wiser to refrain.