I might install it then. The IPs listed... why are they misleading, and can you end up banning someone else who the guest has nothing to do with?
These IPs are retrieved via the user ID. It works fine for registered users - for example, if you check the IPs of user 48, it will show the IPs of all posts with the user ID 48.
But the problem with guests is that all of them have a user ID of -1. Which means that when you try to view the IP of one specific guest, that column will list the IPs of "user -1" - the IPs of all guests that have ever posted on your forum. So you'll get a list of IPs that the page says this guest has posted from, whereas it actually shows a lot more.