My daughter is on ask. I can only give a parent's perspective - it's a simple concept but high potential for disaster, lots of inappropriate language and bullying, preying on self-esteem, and photos can be posted in answers but I don't think in questions (?). I don't think profiles can be made private, but you can block other users and you can adjust settings to not allow anonymous questions. Also, nothing posts to your page for others to see unless you respond to it. I think kids who grow up with this stuff don't discern the dangers easily because it's their normal.