This will prevent Brian 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.
“Grow old along with me! The best is yet to be, the last of life, for which the first was made. Our times are in his hand who saith, 'A whole I planned, youth shows but half; Trust God: See all, nor be afraid!”
―
Robert Browning