Even diet sodas are harmful for the routine functions of the stomach. After a while, stomach becomes depended on the effects of soda in digestion and stops its natural funtions. It also increases the risk of acid reflux that would result in heartburn. The sugar content in non-diet sodas can increase the risk of diabetes and increase the weight in an unhealthy manner. Caffeine can make just about anyone more irritable, especially women.

Occasional drinks of soda aren't that harmful, but as I've seen real life examples including myself, kids tend to go overboard with sodas. I wouldn't want my children to go down the same path, and be told to stop drinking it altogether after sever stomach problems. However, I'm not sure where and at what age we need to draw the line. Something tells me people have to see some stuff for themselves.