Adding CSRF protection to simple comment forms in Django

Question

I have blog comment forms in Django and I would like to know the following:

1. Should I add CSRF to the forms?
2. If I want to use the simple "render_comment_form" method, how do I add it?
3. If I can't add it like that, what is the best practice for doing it?

Each tutorial or discussion on the subject seems to have a different approach, and I am not certain I understand how it all works.