Good for him but not sure why he feels the need to push his zero-alcohol policy on others. I'd guess more people drink for other reasons than to "get drunk" but I guess this was his only reason.
I mean I guess you could drink soft drinks with dinner, but to me that's a weird unnatural thing to do (super-sweet, and doesn't fit well either taste- or culture-wise with traditional European cuisine). Water is ok, and I do drink that sometimes.
And I just drink water at dinner, but that's because I really like water. (some nutritionalists would actually suggest drinking a lot of anything while eating a meal is actually hard on digestion.)
Woah, where did you get that? If by a lot you mean drinking whenever you feel thirsty that's definitely not true. If by "a lot" you mean too much, well... obviously. That's why it's called "too much."
There's a reason you often feel thirsty while eating: liquid helps to turn the food you eat into the nutritious slurry which actually can be digested by your body.
Do a literature review. Also, stop listening to nutritionists: many of them don't even have degrees in medicine.
http://ajpregu.physiology.org/content/258/2/R436.short http://gut.bmj.com/content/29/3/306.abstract
And pretty sure he was the one that bought a bottle of champagne for our team to celebrate the end of our adventure through YC...just he didn't drink any.
Interesting that you equate living life to the fullest with not drinking. Drinking a great beer with some friends or having a nice glass of cab with a big steak is high on my list of things to do while living life to the fullest.