There may be situations in which event organizers want to remove attendees from an event. Organizers can remove registrants prior to an event beginning, or remove attendees from live events in progress.
Here's how to remove a user:
After logging into your admin panel, navigate to the event you're editing, and click the Registrants tab.
On the Manage Registrants tab, you can search for the person you'd like to remove from your event by name, email address or company name. Once you locate the person you'd like to remove, click the check box next to their name.
Then click the red Ban button in the top right corner.
You will then see a confirmation window ensuring you'd like to ban this user. Once you ban this person, you will not be able to re-add them to this event. When you are ready, click Ban. 
When you click Ban, if the attendee is in the live event, they will immediately be redirected to the Goldcast user home where a message will display that reads "Unable to access event". That user will not be able to re-enter your event. If the user is not yet inside the event, they will be able to view your agenda on your landing page, but will not be able to click the "Enter Event" button.
Note that organizers and speakers cannot be banned from events. Organizers are identified by a blue icon next to their name. Speakers are identified by a purple microphone next to their name.