I took Programing Languages from him, as well as TA'd for his Operating Systems class. He is an amazing lecturer, and I am glad he is releasing something like this to the public! Definitely something worthwhile to read. Looking forward to more content being released.
If someone really wanted to find out who was behind it, they could eventually do it depending on their motivation. Not to mention when registering the domain, you should enter contact information. If you are genuinely concerned about your safety and wellbeing, I do not think a website would be the way to go.