Is there a way to stop a specific person from sending you event invitations without removing them as a friend on Facebook? If it isn't built in, perhaps there is an application that lets you remove yourself from events after you are invited?
Facebook Events – Block Event Invitations from a Specific Person
facebook-events
Best Answer
Easiest way is when you click decline on one of the person's event invitations, there is now a popup box which asks you to leave a message, and there's a link there to block event invites from that person.