I set up a test Facebook account a while ago, but will not use it. (see here here for some of my reasons) One person talked me into "friending" them although I have Facebook blocked on my network so as to simplify things, and avoid the tracking cookies that everyone gets - regardless of whether they're a member or not. Still, this person results in a huge amount of e-mails. However, since I had the foresight to use an e-mail account specifically for this (facebook@mydomain) it doesn't cause me any problems. In fact every few months I check that e-mail account and snicker at the added volume.