Unfortunately, I have to strongly disagree with you. The future importance of Geo Cities cannot be discounted. One of the most prized finds in archaeology is the ancient human garbage dump... Geo Cities is the largest garbage dump of our generation!! The reason for this is because the knowledge behind many historical items of significance DOESN'T EXIST ANYMORE!!!
Researching even the detritus of Geo Cities would provide a great deal of insight into our culture to those researching it hundreds of years from now. Given the difficulties our civilization has had in researching the construction of the pyramids, Stone Henge, and the Mayan calendar, no reasonable person should be okay with destroying our history... even if it is "garbage." These instances, and many others, demonstrate the vast quantities of knowledge that have been lost throughout the ages. The sad part is that it probably derived from the people of that time having an attitude similar to yours.
As a result, we have people producing documentaries on the History Channel proclaiming ALIENS had to help build the Pyramids and create the Mayan calendar.. because, you know, humans back then had to be too stupid and simple to do it themselves. Heck, we cannot even recover some knowledge from the 1960's and 70's because of our blatant disregard of the potential need for the information in the future!!! Perhaps you may not care, but I would prefer people knowing how we built the Hoover Damn or developed atomic energy. It would be highly insulting for future generations to have create a hypothesis about alien life allowing us to build our great achievements because your attitude resulted in the information being destroyed.
In short, I'd rather future civilizations know too much about us rather than too little.