Since you use Firefox,Keith, you have easy access to your cookies at any time.
Your example of BC is correct; this applies to many sites(Yahoo, for example, to set your unique page). Other cookies retain information that saves you time. For example, when I check the ads for certain companies, cookies will direct me to adds for my locale by a zip code stored in a cookie.
I require sites to get permission to set cookies, and then review them periodically: Tools/Options/Privacy/Cookies/ then click on "view cookies." You can, alternatively, allow applications like Ad-AwareSE review and recommend spyware cookies for deletion; they will generally leave legitimate cookies alone.
Edited by jgweed, 17 July 2005 - 11:56 AM.