I really hope they don't assume that adults in my household are the children's parents, as there's five adults! Two are in the granny flat but legally it's the same address, and there's a lodger. Actually about 10 years ago we did get a phone call from the GP about then-lodger - they were very apologetic, but systems should be set up so you aren't relying on individuals to remember that sometimes they shouldn't follow their usual procedures.
In my community people take confidentiality seriously, so if someone asks if you could give them X's number as their phone has lost it, the reply will be "sure, I'll poke them and give them your number to contact you on". I've found more mainstream people and now school mums etc are much more blase about giving info to anyone - except the childminders, who have had training on data protection.
I'd assumed the thing where courts read out the names and addresses of accused and victims was something that had been abolished years ago - I'm quite shocked it still happens (because if it happens at all, someone's going to cock up and not make an exception where they should - that's life).