There has been a number of cases where FH community member's Steam accounts have been stolen. DO NOT CLICK ANY LINKS FROM YOUR FRIENDS WHO ADVERTISE FREE GAMES! They have had their accounts stolen. NEVER TELL YOUR PASSWORD TO ANYONE OR CLICK ANY SUSPICIOUS LINKS!

Remember to verify your e-mail. See more information here:
https://support.steampowered.com/kb_article.php?ref=5151-RUAS-1543

More information on the FH forums.