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.
“It's not an endlessly expanding list of rights — the 'right' to education, the 'right' to health care, the 'right' to food and housing. That's not freedom, that's dependency. Those aren't rights, those are the rations of slavery — hay and a barn for human cattle.”
―
Alexis de Tocqueville