The options are good, but I don't like the IFS suggestion. Bash has a perfectly good way of dealing with spaces in array elements. Fixing the example in the article is as simple as adding double quotes around the array:

    for name in "${names[@]}"; do
      echo "$name"
    done

The will not result in a single element, but will destructure each element of names, as if each were double-quoted, and will print the same output that the "strict mode IFS setting" does.

What's more, the double-quoted array solution will work even if the elements contain newlines or tabs.

Adding "-E" should be considered as well, so traps are also applied in functions.