This will prevent Mike 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.
“Our job is to love others without stopping to inquire whether or not they are worthy. That is not our business and, in fact, it is nobody's business. What we are asked to do is to love, and this love itself will render both ourselves and our neighbors worthy.”
―
Thomas Merton