I think the only one I would like to tell off is the elder who studied with me. While I was studying, he would do anything for me. He gave me a set of stereo speakers. I heard after I moved out of my parents' place, he came and asked for the speakers back. Apparently, they weren't free.
If I ever encounter him again, I will call him on his conditional love. He's also getting on with age. He must be in his eighties. If he dies before I get a chance to speak my mind, I'll be just as happy.