I will start by saying that I am probably over reacting because it annoyed me.
Just been to the dentist with youngest two DC, they couldn't be seen because the denstist was off sick. Fair enough, it happens but my AIBU is that they said they'd tried to call me all day - I haven't received any calls. The number they were trying was the old house landline even though, when we moved 18 months ago, I gave them all the new information - they confirmed the address on their system is the new one. I said I know they have the mobile number because in the past I have received appointment confirmations by text. They checked, and yes they do have the mobile number on my oldest child's record but they haven't transferred that to the youngest two - despite them all being registered at the same time 10 years ago.
I was already annoyed by that when the receptionist said "I even tried ringing your neighbour to let you know"! It was at that point that I said I think that's a data protection breach.
I know they were trying to help, so yes I probably am being unreasonable but they don't know if I get on with my neighbour, and just because they attend the same dentist - I didn't know that - means she's looked through the records to find someone close by. Obviously no personal information was given but still, should she be doing that?