That sentence is missing a few important words. It is a bad thing that he is using a Matt Wright script. The good idea is finding something else to replace it.

Limiting by IP address is a half measure. I was just pointing out that sometimes a half measure is better than nothing. Many times, a couple of half measures is all that is required. They shouldn't be mistaken for real security. It all depends on how easy it is to implemenet and what level of security is required.