As a student you can decide what type of personal information can be seen by other course members. To set your privacy options click My Places at the top of your Bb page and then click Personal Information on the page that appears. On the Personal Information page click the link for Set Privacy Options. From here you can set what personal information is viewed , whether or not you want your information listed in the User Directory, email options and Roster options.
NOTE that your instructor will ALWAYS have access to your Name and Email.