I googled for "buy viagra" and spotted "The University of Kentucky Campus Guide" at the 8th place in search result. Really at the URL of www.uky.edu/CampusGuide is the real Campus Guide of UKY. But when you click on this link in Google you will go to http://extra-drug.com/viagra.php It's an affiliative shop of GlavMed pharmacy affiliate network. So, the main question is, how it is possible?
you can report to google, if you feel your site are not getting position JUst because of this.. but all i can say tht Black hat is still alive somewhere, just need to you search them, try them, if work then do same thing until thats gonna not work.. and then still find the other whole loops.
Upd: so, is it an exploit using 302 server redirects? more info: http://clsc.net/research/google-302-page-hijack.htm http://googlesystem.blogspot.com/2007/02/blogspot-redirect-spam-floods-search.html http://www.seroundtable.com/archives/000928.html http://clsc.net/research/google-302-page-hijack.htm
I do not know this for sure so I stand to be corrected by the experts but I think this is what is called "parasite hosting". I recently read an article somewhere and this URL was listed as an easy target. What I didn't understand when reading the article was how people manage to use or infiltrate these .edu sites. Apparently they use sites with high trust value. But then again, maybe it is a legit person like a student or faculty member who is permitted to use the url. I wondered about these links myself but really do not know enough about it.
It's called parasite hosting. People put their own content (or redirect) there via XSS (cross site scripting) exploits or other means, points LOADS of links towards the page and get good rankings for competitive terms by abusing the authority .edu sites have in google. Alot of this stuff is popping up in the serps lately, more every day.