SharePoint allows you to create a personalized version of a web part
page. This means you can add/remove web
parts or modify some web part properties that allow personalization changes.
So you don't want your users to be able to personalize pages? Here's how.
Central Admin -> Web applications
Select the web application you want to apply changes (sadly this is
changes applies to the full web app).
Scroll to the bottom of the list of options and observe the last two.
Clear the options "Add/Remove Personal Web Parts" and "Update Personal Web
Parts", to prevent the user personalizing the web part page.
Now the user cannot personalize the page!