title: Django-registration and activation failure
body: <p>I don't under stand how django-registration is handling activation failure? Say, a user just uses a dummy activation key and invokes the url in browser /activation/"key". Now, activation will fail but which url should users be directed to? And, also, the user should be shown the error message. Correct? But, I find after clicking activate, user is shown the activate.html only.</p>