I don't think it is about being a bad/good mother. It's about knowing that the stuff is full of sugar and caffeine which is really bad for adults AND kids, and what could happen to your kids if they drink it a lot, if they have it occasionally and the affect on them! I know lots of people who say that when their kids drink a lot of sugary drinks they do get a sugar high and run around like mad, but then also get a sugar low and get the hysterics once they come down from the sugar rush! Mine have never had enough to have a huge reaction but I know some kids do.

I know for me, part of it is that I don't want them thinking it is anything other than a "sometimes" thing to drink (soft drink here not Cola) at parties etc and that is it. Same with juice - we have it here and they know they are allowed to have it about once a week with dinner as a treat.