Note: The visitor center involves the use of 'Cookies'.   Perhaps a quick Cookie course is in order.

•  Cookies are small text files.
•  These files are stored on the client's (your) computer, not the web page provider (server).
•  Only the server (Web site) that sent the cookie can read the cookie.
•  A cookie can only store information that the user (you) voluntarily place in the cookie.
•  The server (Web site) only has access to the information that you placed in the cookie.
•  Cookies are a very safe way for you to store Ids, passwords, favorite pages, etc. so that if you
   ever return to a site, this information need not be entered again.

In summary, in allowing cookies, you are only telling the server to create a small text file on your
computer that contains information that you have already given the server anyway and thus you will not have to enter this information again on the next visit to this same site.