I'm new to Drupal, but good with SQL and PHP. I'm running drupal 7.9 (I'll upgrade to 7.10 this weekend) with a bunch of modules including; views, fileds, and profile2. This site is for my local homebrew club, and I've added a new field to the account settings to indicate the latest year that club dues have been paid by this member. Obviously I don't want a user to be able to change this on their own. How do I lock this down so it can be seen, but not edited by the user in their user page?