Spam: The other white meat

Here's what Google says about themselves (taken from here)

4. Democracy on the web works.

Google works because it relies on the millions of individuals posting websites to determine which other sites offer content of value. Instead of relying on a group of editors or solely on the frequency with which certain terms appear, Google ranks every web page using a breakthrough technique called PageRank™. PageRank evaluates all of the sites linking to a web page and assigns them a value, based in part on the sites linking to them. By analyzing the full structure of the web, Google is able to determine which sites have been "voted" the best sources of information by those most interested in the information they offer. This technique actually improves as the web gets bigger, as each new site is another point of information and another vote to be counted.

Unless of course, you're tempted by the idea of marketing to a billion plus people. Then of course, you might change how you do things. Just maybe. Take for example the following two searches for "tiananmen square" on google.com and google.cn (China).