its optional you just don't add it to it or delete it before you save the program   

1. Közösség
2. Computing Platform Community Discussions
3. Idea: Hiding your own projects from the hot list

I joined Khan a month before the badges were retired at least I got one retired earth badge  

1. Közösség
2. Technical Issues and Workarounds
3. 50 badges showing as retired.

it would be cool if there was a contest and the prize would be the avatars made by the top three  people would be official avatars .

1. Közösség
2. Feature Requests and General Site Feedback
3. Request for more Avatars