我发现Facebook和ZoneAlarm经常性的搞这种活动，凡是Facebook用户在今天（2010年4月13日）可以免费获得ZoneAlarm杀毒软件和防火墙套装一年的使用权！
具体方法如下：
Get Tax Relief
Tax Season is also Identity Theft Season
Get a FREE protection package, a $120 value
from ZoneAlarm® and Identity Guard® for 1 full year.
Fan us on Facebook® and Get it TODAY, or return tomorrow.
* Step 1: Fan Us on Facebook
* Step 2: Go to the Free Promo tab
* Step 3: Select your free offer
活动页面：http://promotions.zonealarm.com/security/en-us/cdn/pt/index.htm