This will prevent Lisa 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.
“There are scores of people waiting for someone just like us to come along; people who will appreciate our compassion, our encouragement, who will need our unique talents. Someone who will live a happier life merely because we took the time to share what we had to give.”
―
Leo Buscaglia