E-mail addresses

Am I right in thinking that our personal e-mail address is not visible unless we want it to be?  I have received an unsolicited  private e-mail from someone who claims to have read my profile on the RSPB forum and now wants to be my 'friend'.  When I checked my profile I can't see anything there that shows my 'home' addy. Needless to say I am ignoring it.

Caroline in Jersey

Cin J