Discipline?

Last weekend we took Dash to the wading pool, which was a slightly scandalizing experience for both Mommy and Dash (Mr. Incredible was using his superpowers at the driving range). We happened to arrive just in time for not one, but two toddler birthday parties, so there were dozens of 1-5 year olds everywhere. Dash was a bit taken aback by the screaming, splashing, pouring, jumping chaos all around. I was the only parent in the water, while the toddler parents were chaperoning from the sidelines. They were CONSTANTLY chastizing their little ones for their behavior. I'm all for a rowdy, rolicking good time in the pool, but kids were pouring water on others' heads and making others cry. In my view, this doesn't merit a third or fourth warning, but if Dash had knowingly poured water on a little girl's head who said NO! he would be out of the pool in no time. No warnings. I'm quite certain that my parents would have done the same for me. Anyway, the constant warnings and lack of enforcement/consequences got me thinking about discipline and realizing that I don't know much about the matter. But I have to think that let your no mean no and your yes mean yes is pretty good advice. But perhaps that is just easier for me to say now...