TryNinja has already said that they are from untrusted networks. Now, if you go to your trust setting and include the name of those persons from whom you got feedback, you can see those in your profile. No one else will see as long as they will also be included in their trust list. For example, if I add sparkweb in my trust list, I will see the feedback. I have just added sparkweb in my trust list for showing you.