This will prevent Ren 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.
“Waylon said it best when he sang to Willy; 'If you see me gettin' smaller, I'm leavin' don't be grievin', just gotta get away from here. If you see me gettin' smaller, don't worry, I'm in no hurry I've got the right to disappear.”
―
Waylon Jennings w/ Lenny Kaye