Internet Storm Center has an important reminder about things which claim to be electronic Christmas greeting cards, but are actually much more (or less, depending on how you look at it).  My advice: don't click them at all, and if you want to send one to your friends, do it by copying and pasting the link into a personal email.

Content type

• Links

Topic

• Web
• Security
• software
• email
• virus
• trojan
• worm