Login forms are everywhere on the web. Are you using the social networks? You must go through login form of some sort. Do you have an email? Did you join any forums? Did you try to leave a comment on a WordPress site? To gain access to anything on the internet, the chances are you will have to go through some sort of login process. You will probably have to register first, sign up or leave some information behind. You will have to use some sort of login form to do anything on the internet.