My parents know a Professor A who knows another Professor B. Professor A has known me since I was a child. I applied for a Ph.D. position in Professor B's group and got admitted. Before admission, Professor A recommended me to Professor B orally but without writing a formal recommendation letter. I used the recommendation letters from other professors I really worked with.
Now, a Ph.D. student in our group learnt about this (my bad, I exposed this myself) and says I was cheating. And he just told everybody because of jealousy. I think I was fairly exploiting my personal network and also I don't know how much the oral recommendation was taken into account during admission. I also don't know what Professor A said to B. Whether he even really said something about me is a mystery to me. But I am totally qualified to get this position on my own.
Now many different versions of this rumor have come out. This is not the expected start of my Ph.D. life. I thought that everybody in my group might be friendly. But really, was I cheating during the admission? I might think about transferring to another group after all this.