apache configuration regarding fetching other sites

I noticed lines like this in my log.

91.212.127.100 - - [07/Sep/2010:14:20:14 -0500] "GET
http://allrequestsallowed.com/?PHPSESSID=5gh6ncjh00043PQSHW%5EEYCMKJGUV
HTTP/1.1" 200 44 "-" "Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US;
rv:1.8.1.12)$

The response code of 200 tells me that it worked for whoever is wanting the
information. What is that method called that they’re using, and how do I
configure apache to ignore such requests?
Thanks,
-tom

Well, after some more checking, it seems that Apache is just serving my index page and not something from the URL in the entry. It’s not a problem after all.