I don't like IP-based bans, they're too much of an on/off switch which can hit the wrong people (think dial-up) and seems too drastic a measure. I thought that displaying the IP address would give additional information to readers which would be useful in their understanding of a node as well as in dealing with it. It appears that most people think even that is too harsh.
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. -- Brian W. Kernighan