Ice is fine so long as it isn't in my drink. I think that ice in drinks is most of the time the most silly practice possible. Allow me to go into detail:
1) It is desirable for a drink to be cold
2) It is desirable for a drink to have a moderate concentration
In most circumstances, except those in which, for example, a pitcher of tea is just made, a drink will already be cold when you get it. Go to Burger King and buy a large drink but don't get ice. The soda will be cold from the dispenser. The odds are that, unless it takes you an hour to eat a meal there, you drink will still be cold when you finish. Not only that but you can put more soda into the cup if you don't use ice, which is particularly handy if you don't get free refills. If you do get ice you have very little benefit. The drink might stay cold longer, but you get less in a cup. And by the time you finish your soda it might taste watered down because of melting ice, which is undesirable.
Because, as demonstrated in the circumstances above, there is nothing to gain from ice, it is therefore a waste of good water.