Stories like this make me happy I don't like ice in my cold drinks.
The Chicago Sun-Times tested 49 different restaurants and fast food places in the area and found out that not only did 1 in 5 have ice cubes that had high levels of bacteria, 21 of the 49 had toilet water in the Sun-Times restroom that had less bacteria than the ice cubes. The paper actually names the restaurants.
Now, this either means the restaurants aren't handling their ice cubes correctly (or there's something in the water), or the urinary and digestive tracts of Sun-Times employees are unusually clean.
I remember I worked in a restaurant that had a large sink behind the bar that we just filled with ice, and it was left open. I can imagine what could have fallen in there or how clean the sink was when the ice was put in.