This will prevent Joyce 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.
“A little arrogance (or even a lot) isn't such a bad thing, although your mother undoubtedly told you different. Mine did. "Pride goeth before a fall, Stephen", she said... and then I found out - right around the age that is 19 x 2 - that eventually you fall down, anyway.”
―
Stephen King