This will prevent Karen from sending you messages, friend request or from viewing your profile. They will not be notified. Comments on discussion boards from them will be hidden by default.
“Always in the big woods when you leave familiar ground and step off alone into a new place there will be, along with the feelings of curiosity and excitement, a little nagging of dread. It is the ancient fear of the Unknown, and it is your first bond with the wilderness you are going into.”
―
Wendell Berry