I had a call from my bank, and they before the they could even tell me what it was about, they asked me to answer some security questions. When I pointed out out how ridiculous that was, and I asked them to prove their identity first, they didn't even have process for it. Calling back was also impossible since apparently there was no way to get connecter back to the person with whom I was speaking.
I was unable to get back in touch with them, and a week later someone else called from the bank trying to do the same, and the same thing happened again. I refused to answer their security questions and they had no way to prove their identity.
The next time they called, they didn't ask for the security questions anymore and just got to the point immediately. They have never asked for it since. I wonder if I'm flagged in their database as someone who shouldn't be asked security questions.