I want to stop the registration form from sending "email activated" email to users, is there a way to stop them?
Google is your friend, a search for "drupal 7 user registration email settings" produced:
configure user registration, user email, and user picture settings on the Account settings page:
Administer > Configuration > People > Account settings) in Drupal 7, and (Administer > Settings > User) in previous versions.
There is a checkbox in the Account settings ->Mail section -> Account activation that says "Notify users" just untick that and we are good to go.
To stop all e-mails, see: How can I stop Drupal from sending e-mails of any kind?