As I type this reply to you, there are 37,365,354 folks on-line. That is a really big directory! The facility you seek was limited to the "Add a Contact" as we have it now, several versions ago.
If a suggested idea resolves your question, please click on the "Accept as Solution" button so everyone else will see what works!
-> Please send Private Messages only upon request.
-> Good reads: Devise good passwords and stop password attacks
and this one, too: http://www.rd.com/slideshows/internet-security-how-not-to-get-hacked/