It should not be used in a smoker.
I have even seen one thread where the smoke basket was being made out of galvanized, and the argument was forwarded that the temp of the smoker is well below the heat required to make the zinc harmful...The trouble with that argument is this: The smoker may be at 225-250, but the charcoal is in the zinc basket humming along at 700-900 degrees, and coating your food with zinc while you look the other way!
There are better alternatives, and the risk of zinc poisoning is great. Do yourself, your family, and your friends a favor and don't risk their health over something like this.