[swmobuffalo]

I've never been in a fast food place or a restaurant that had ice sitting out in the open for use in drinks. On a salad bar to keep the food cool yes, for drinks no.

[spunkets]

Once the water comes out of the faucet, it's exposed to air. Then it's crushed. Some may have dispensers, but they're still exposed to air. I remember them scooping ice out of some container.

[sausageseller]

There is air in the ice bin. The water also touches many surfaces from the point it enters the ice machine to when is dispensed as ice. It is impossible to have all those surfaces bacteria free.

You have more bacteria under your finger nails than fresh water just dispensed into a toilet.