Not you. Right?
Oops - that sounded awful. Let me rephrase that as I meant it - what would you have done?
Well, fwiw, I would've stopped and waited until someone called the cops (or I'd do it, obviously, if I had a cell) but there is just about no chance in heck I'd put the kid in the car! Maybe if someone was bearing down on the scene with a knife, or something like that. :)
And I wouldn't have been happy about it in any case. Much as some others have mentioned above, I do not even acknowledge the presence of kids anymore. Who needs the potential hassle?