This will prevent Jim 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.
“The true test of any scholar's work is not what his contemporaries say, but what happens to his work in the next 25 or 50 years. And the thing that I will really be proud of is if some of the work I have done is still cited in the text books long after I am gone.”
―
Milton Friedman