How to delete a Udacity account?
The description of the service:
Udacity is a for-profit educational organization. According to Thrun, the origin of the name Udacity comes from the company's desire to be "audacious for you, the student". While it originally focused on offering university-style courses, it now focuses more on vocational courses for professionals.
A Udacity employee recommends that you stop using the account, which means there's currently no way of deleting the account.