A friend mentioned that they are planning on squeezing 5 adults and a 6yr old into one standard sized car for a specific short journey (approx. 3miles). The journey is slow moving (no more than 30) and stop start with traffic and traffic lights etc. Friend's thinking is that it is a short, slow low risk journey and we did it all the time when we were kids. AIBU to be horrified by this and persuade them not to do it or is this ever OK to do??