Noddy that's great - level headed, articulate and not bothered!
As a child, aged about 5, living in a tiny place, a car pulled up and asked for directions (when I was out playing and a few hundred yards from home) and then asked me to get in and go with him to show him

I didn't want to anyway and just said no - I wasn't allowed - I'd had the 'strangers' talk but no reasons ever given for the danger. I didn't even tell my parents as it was a minor incident to me - looking back though .....
You do need to warn children that some strangers aren't trustworthy and could hurt them - it's the going off with them or being asked to keep secrets that is the danger zone.
Also. statistically most abusers are well known to the child and family
Soz is so open - that's crucial, it's the no secrets bit that is important as abusers rely on a child not telling.