-e is nice for constantly used variables that may not get unset. I think it's a good rule to remove any data you created that you do not need.
With this script I would want to unset the variable. I don't see any reason to have the variable there unless you wanted to give them a voice automatically later on.
Also, I think it is a good idea to name your variables. At the very least, it makes it easy to find them with a script.
