I hate it so much. Plus I get really angry that people don't follow phone etiquette. As a child I was told to state who you are when you call the other person, ex. "Hello, this is Jane, can I talk to John?".
However nowadays it seems that no one, not even people at work follow this rule. I currently live with a family member. The other day someone called them and just asked for them by their first name, that's it. I said "who's calling?". They were offended "This is their doctor's office, I need to talk to them, etc". So I felt the need to apologize "we get a lot of telemarketers so I had to check" but why should I apologize when you won't even tell me who you are first?
It reminds me of one of my sisters who only used to call a couple of times a year and when I asked who she was she said "don't your recognize my voice?", uh, I never hear from you, no.