There was a good article by David Horowitz (sp?) in the most recent Costco magazine, and he said never to click through an email link or website link. His advice was to Google said link instead of cutting and pasting into a browser. If you Google it, you'll get tested results that will reveal whether these sites have malicious intent. I don't really know how that works, but hope that helps.
If your friend warned her friends (including you) on her facebook, I'd probably take that seriously.