I always tried to discourage my kids from drinking them,and when they where about 10 (7 years ago)we where out shopping and they asked for them as they where on offer (I trained them to be bargain hunters from an early age!)I refused,and they where most put out when the person in front of us at the checkout gave her kid one.......the kid was still in a buggy for goodness sake!!!
I have recently converted to sugar free fizzy drinks,but think I have grown up at last-there is still a bottle of Pepsi in the kitchen from last year,and have a large collection of cans my daughter has given me,I just haven't the heart to tell her I don't drink them any more,she gets them for me to cheer me up,bless.