Not sure how much of a problem it can cause, but if you Google:
"what'smyip", "whatismyip", "what is my ip", "whats my ip"

or anything of the like, it brings up pages such as www.whatsmyip.org.
But if you look at the description of the site, it already has an IP there....that IP belongs to the GoogleBot that cached the page. Google's bots have openly available IP's.

I went to ARIN, and searched whois for the IP, and it gave me info that Google probably does not want available.

Well, like I said, I'm not sure how much of a problem it is...but it's here for your knowledge.

A_T