I used to drink a lot of water during childhood; that was way before the whole "8 glasses a day" thing. My parents, however, went to great lengths to stop me from going "drinking water when I'm not thirsty". They justified it as "we're your parents, and we care about your health". They picked up this idea that drinking "too much" water (notice the quotes) was bad for my kidneys. So whenever they saw me heading for the Brita pitcher, they would yell at me to turn around and go back, or if I already got water, they would grab the glass from me and pour it out. Apparently, they thought that the water or other liquids I got during meals were enough. I found myself secretly wishing for my parents to just disappear.
But don't feel too sorry for me. I got around their draconian tactics pretty nicely. I would go into the bathroom, lock the door, and drink from the faucet. At one point, they caught on to this, and said to me: "If you're thirsty, then ask for water; don't drink it in the bathroom". But since I flushed the toilet every time, they never had any proof that I was deceiving them. Of course, when I did ask for water directly, they told me I was only pretending to be thirsty, unless I asked during or right after a meal. Lies and deception were my best non-human friends at the time.