I agree

1. Közösség
2. Feature Requests and General Site Feedback
3. Having the option to turn off notifications

I like the idea!

1. Közösség
2. Feature Requests and General Site Feedback
3. The Ability To See If Someone Is Online.

Hmm...good idea but to be honest it is kind of on you not to make typos. Rechecking your work is an important part of learning.

1. Közösség
2. Feature Requests and General Site Feedback
3. Second Chance on “Typed Response” Questions

Personally I like the idea, but I don't think they will add it because KA is a learning platform and not necessarily a way to make friends.

1. Közösség
2. Feature Requests and General Site Feedback
3. Add a "add friend" option

I don't think you can lose any energy points.

1. Közösség
2. General Khan Academy Questions
3. Is it possible to lose energy points?