Do you set up your own method for people to unsubscribe or is there an automatic unsubscribe option?

"STOP" is a universal word to unsubscribe. Removing subscribers from your list does not unsubscribe them. You can unsubscribe an end user by going to All Responses, search for the number, then click the unsubscribe button on the right. End users who are unsubscribed must text the word START to resubscribe. You cannot do this for them.