Displaying IP address' is a very bad idea and probably breaks some computer security laws. I think if anyone used these sigs on our site we might have to consider removing them - as clive siad they are intimidating. Plus by doing this we would make it slightly easier for our members, who at times will be having serious computer security issues, to be hacked.
I agree that it is some interesting software though. Oh and Joudi we already have scripts that tells us an awful lot about our users, including your ip address :-) - paranoid yet? :-)