Remember when I cleared the projects page and subsequently got in trouble at school? Code.org was able to identify me and what school I go to through my username (firstname_lastname707) and email (my school email).
This Code.org Support article states that student email addresses are encrypted and non-retrievable. However, why would they be able to find my school if they couldn't get my email address?
If your account's email has personally identifying information, I strongly suggest you create a new account and move your projects there. Considering how insecure code.org's systems already are, I wouldn't be surprised if someone hacks them and leaks the personal information of over 10 million students.