Google Search – How to Default to International Search in Google

{google:baseURL} is defined in the source as http://www.google.com/. {google:RLZ} has to do with RLZ. The other two seem to have to do with what you type in the address bar and what you actually pick for Chrome to search on.

Disable it as a user or a webmaster? This is in superuser so assuming its not for a site you control (if it is, use Google Webmaster Tools).

As @MikeKusold pointed out, Greasemonkey is the better option if you use Firefox (or any equivalent for your browser). Looking at the page structure in Firebug, it doesn't seem too hard to write css for a user-defined style to hide them all either; again this would depend on browser support.

Edit: Overlooked that you're using Chrome, don't know if it has a GM equivalent but user style sheets should be an option.